Yosemite Valley in the Sierra Nevada.
Northern California is the
northern portion of the U.S. state of
California
. The region contains the San Francisco
Bay Area
, the city of San Francisco
, San
Jose
(the third-largest
city in California
), Sacramento
(the state capital), as well as the redwood forests, the northern California coast, the
Big Sur
coastline area, the Sierra Nevada including Yosemite Valley
and Lake
Tahoe
, Mount
Shasta
(the second-highest peak in the Cascade Range), and the Central
Valley
, one of the world's most productive agricultural
regions.
Native Americans arrived in Northern California at least as early
as 5,000 to 8,000
BC and perhaps even much
before, and successive waves of arrivals led to one of the most
densely populated areas of pre-Columbian North America. The arrival
of European
explorers from the
early 1500s to the mid-1700s, did not establish European
settlements in Northern California.
In 1770, the Spanish mission at Monterey
was the first European settlement in the area,
followed by other missions along the coast—eventually extending as
far north as Sonoma
County
.
Description

The forty-eight California counties
within a conventional definition of "Northern California."
Definitions of what constitutes "Northern California" can vary.
When the state is divided into two areas (Northern and Southern
California) the term "Northern California" conventionally refers to
the forty-eight counties north of the ten counties of
Southern California; the term is also
occasionally applied to the area north of the
Tehachapi Mountains.
This common and
intuitive definition coincides neatly with the county lines at 35°
47′ 28″ north latitude (the sixth standard parallel south of the Mount Diablo
base) which form the southern boundaries of
Monterey
, Kings
, Tulare
and Inyo
Counties.
Because of California's large size and diverse geography, the state
can be subdivided in other ways as well. For example, the Central
Valley is a distinct region in itself both culturally and
topographically from coastal California, though in Northern versus
Southern California divisions, the Sacramento Valley and most of
the San Joaquin Valley are usually placed in Northern
California.
The state
is often considered as having an additional division north of the
urban areas of the San Francisco Bay Area
and Sacramento
metropolitan areas. Extreme northern
residents have felt under-represented in state government and in
1941 attempted to form a new state with southwestern Oregon to be
called
Jefferson, or more
recently to introduce legislation to
split
California into two or three states. The region north of
Sacramento is referred by locals as the Northstate. Since 2001, the
20 northernmost counties have promoted the region from Point Arena
to Lake Tahoe and northward as
Upstate California.
Significance
Since the events of the
California
Gold Rush, Northern California has long been a leader on the
world's economic, scientific, and cultural stages.
From the development
of gold mining techniques in the nineteenth century which were
later adopted around the world, to the development of world-famous
electronics and on-line business models (such as Apple
, Hewlett-Packard,
Google, Yahoo!, and
eBay), Northern California has been at the
forefront of new ways of doing business. In science, advances
range from being the first
to isolate and name fourteen transuranic chemical
elements, to breakthroughs in microchip technology.
Cultural contributions include the works of
Ansel Adams,
George
Lucas, and
Clint Eastwood, as
well as
beatniks, the
Summer of Love,
winemaking, and the open, casual workplace
first popularized in the Silicon Valley
dot-com boom and now widely in use around the
world.
Geography and climate
Northern California's diverse geography ranges from the sandy
beaches of the Pacific coast to the rugged, snow-capped
Sierra Nevada mountains in the east.
The
central portion of the region is dominated by the Central
Valley
, one of the most vital agricultural areas in the
country. The Sierra Nevada contains Yosemite Valley
, famous for its glacially-carved domes, and
Sequoia
National Park
, home to the largest trees on Earth, the giant sequoia trees, and the highest point in
the contiguous United
States, Mount
Whitney
. The tallest living things on Earth, the
ancient
redwood trees, dot the coastline,
mainly north of San Francisco.
Bristlecone
pines located in the White Mountains
are the oldest known trees in the world; one has an
age of 4,700 years. The area is also known for its fertile farm
and ranch lands, wine
country, the high mountains of the southern Cascade Range, the Trinity Alps
, and the Klamath
Mountains, lakes, and the windswept sagebrush steppe, in the northeast portion of the
region.
The climate can be generally characterized by its
marine to warm
Mediterranean climates along the
coast, to alpine climate zones in the high mountains.
Apart from the
San Francisco
Bay Area
and Sacramento metropolitan areas
(and some other cities in the Central Valley), it is a region of
relatively low population density.
Cities
Northern
California's largest metropolitan
area is the San Francisco Bay Area
which includes the cities of San
Francisco
, San Jose
, Oakland
, and their many suburbs.
In recent
years the Bay Area has drawn more commuters from as far as Central
Valley
cities like the California state capital, Sacramento
, from Stockton
south of Sacramento, and Modesto
about to the south. With expanding
development in all these areas, the San Francisco Bay Area,
Monterey Bay Area, and central part of the Central Valley and
Sierra Nevada foothills may now be viewed as part of a single
megalopolis.
The
state's largest inland city, Fresno
, is farther south in the Central Valley, but
considered part of Northern California in cases when the state is
divided into two parts. Other cities in the region include Redding
at the northern end of the Central Valley, Chico
and Yuba
City
in the mid-north of the Valley, and Eureka
on the northern coast.
Selected cities
The following cities and towns in Northern California have over
50,000 inhabitants.
- Alameda
(pop. 75,254)
- Antioch
(pop. 100,150)
- Berkeley
(pop. 102,743)
- Chico
(pop. 84,396)
- Citrus Heights
(pop. 85,017)
- Clovis
(pop. 92,269)
- Concord
(pop. 121,780)
- Cupertino
(pop. 55,162)
- Daly City
(pop. 103,621)
- Davis
(pop. 64,938)
- Elk Grove
(pop. 139,609)
- Fairfield
(pop. 96,178)
- Folsom
(pop. 72,590)
- Fresno
(pop. 481,035)
- Fremont
(pop. 210,160)
- Hanford
(pop. 50,370)
- Hayward
(pop. 155,312)
- Livermore
(pop. 82,845)
- Lodi
(pop. 63,395)
- Madera
(pop. 55,780)
- Manteca
(pop. 65,076)
- Merced
(pop. 79,715)
- Milpitas
(pop. 66,568)
- Modesto
(pop. 207,010)
- Mountain View
(pop. 70,708)
- Napa
(pop. 72,585)
- Novato
(pop. 52,426)
- Oakland
(pop. 415,492)
- Palo Alto
(pop. 61,200)
- Petaluma
(pop. 56,996)
- Pittsburg
(pop. 56,769)
- Pleasanton
(pop. 71,882)
- Porterville
(pop. 51,467)
- Rancho Cordova
(pop. 59,056)
- Redding
(pop. 104,295)
- Redwood City
(pop. 79,000)
- Richmond
(pop. 103,828)
- Rocklin
(pop. 51,951)
- Roseville
(pop. 106,266)
- Sacramento
(pop. 467,343)
- Salinas
(pop. 148,350)
- San Francisco
(pop. 799,193)
- San Jose
(pop. 989,496)
- San Leandro
(pop. 81,466)
- San Mateo
(pop. 92,482)
- San Rafael
(pop. 56,063)
- San Ramon
(pop. 58,035)
- Santa Clara
(pop. 109,000)
- Santa Cruz
(pop. 54,593)
- Santa Rosa
(pop. 156,200)
- South San Francisco
(pop. 60,552)
- Stockton
(pop. 295,000)
- Sunnyvale
(pop. 131,760)
- Tracy
(pop. 80,505)
- Tulare
(pop. 55,935)
- Turlock
(pop. 69,321)
- Union City
(pop. 72,297)
- Vacaville
(pop. 96,735)
- Vallejo
(pop. 125,900)
- Visalia
(pop. 117,774)
- Walnut Creek
(pop. 64,296)
- Watsonville
(pop. 51,258)
- Woodland
(pop. 55,960)
- Yuba City
(pop. 62,083)
Metropolitan areas
Northern California is home to three of the state's four
metropolitan areas that are home
to over three-fourths of the region's population as of January
2009:
Major business districts

Downtown Oakland by air
The following are major central business districts:
History
Historical events to 1847
Inhabited for millennia by
Native Americans, from
the
Shasta tribe in the north, to the
Miwoks in the central coast and Sierra Nevada,
to the
Yokuts of the southern Central Valley,
Northern California was among the most densely populated areas of
pre-Columbian North America.
European explorers
The first
European to explore the coast was Juan Rodríguez Cabrillo,
sailing for the Spanish Crown; in 1542, Cabrillo's expedition
sailed perhaps as far north as the Rogue River in today's Oregon
.
Beginning
in 1565, the Spanish Manila galleons
crossed the Pacific Ocean from Mexico
to the
Spanish Philippines
, with silver and gemstones from Mexico. The
Manila galleons returned across the northern Pacific, and reached
North America usually off the coast of Northern California, and
then continued south with their Asian trade goods to Mexico.
In 1579,
Northern California was visited by the English explorer Sir Francis Drake who landed north of
today's San
Francisco
and claimed
the area for England
. In 1602, the Spaniard Sebastián Vizcaíno explored
California's coast as far north as Monterey Bay
, where he went ashore. Other Spanish
explorers sailed along the coast of Northern California for the
next 150 years, but no settlements were established.
Spanish era
The first European inhabitants were Spanish missionaries, who built
missions along the
California coast.
The mission at Monterey
was first established in 1770, and at San
Francisco
in 1776. In all, ten missions stretched along the
coast from Sonoma
to Monterey (and still more missions to the
southern tip of Baja
California
). In 1786, the French
signaled their interest in the Northern
California area by sending a voyage of exploration to
Monterey.
The first twenty years of the 19th century continued the
colonization of the Northern California coast by Spain. By 1820,
Spanish influence extended inland approximately 25 to from the
missions. Outside of this zone, perhaps 200,000 to 250,000 Native
Americans continued to lead traditional lives.
The Adams-Onís Treaty, signed in 1819
between Spain and the young United States
, set the northern boundary of the Spanish claims at
the 42nd parallel, effectively creating today's northern boundary
of Northern California.
Russian presence
Russians,
from Alaska
, were moving down the coast, and in 1812
established Fort
Ross
, a fur trading outpost on the coast of today's
Sonoma
County
. Fort Ross was the southernmost point of
expansion, meeting the Spanish northern expansion some north of San
Francisco. In 1841, as the American presence in Northern California
began to increase and politics began to change the region, a deal
was made with
John Sutter and the
Russians abandoned their Northern California settlements.
Mexican era
After Mexico gained
independence from Spain in 1821,
Mexico continued Spain's missions and settlements in Northern
California as well as Spain's territorial claims. The Mexican
Californios (Spanish-speaking
Californians) in these settlements primarily traded cattle hides
and
tallow with American and European
merchant vessels.
In 1825,
the Hudson's Bay Company
established a major trading post just north
of today's Portland, Oregon
. British fur trappers and hunters then used
the
Siskiyou Trail to travel
throughout Northern California. The leader of a further French
scientific expedition to Northern California,
Eugene Duflot de Mofras, wrote in
1840 "
...it is evident that California will belong to whatever
nation chooses to send there a man-of-war and two hundred
men." By the 1830s, a significant number of
non-
Californios had immigrated to Northern California.
Chief
among these was John Sutter, a European
immigrant from Switzerland
, who was granted centered
on the area of today's Sacramento
.
American interest
American trappers began entering Northern California in the 1830s.
In 1834,
American visionary Ewing Young led a
herd of horses and mules over the Siskiyou Trail from missions in Northern
California to British and American settlements in Oregon
.
Although a small number of American traders and trappers had lived
in Northern California since the early 1830s, the first organized
overland party of American immigrants to arrive in Northern
California was the
Bartleson-Bidwell Party of 1841 via
the new
California Trail. Also in
1841, an overland exploratory party of the
United States Exploring
Expedition came down the
Siskiyou
Trail from the Pacific Northwest.
In 1846, the Donner Party
earned notoriety as they struggled to enter
Northern California.
Beginning of United States era
When the
Mexican-American War
was declared on May 13, 1846, it took almost two months (mid-July
1846) for word to get to California. On June 14, 1846, some 30
non-Mexican settlers, mostly Americans, staged a revolt and seized
the small Mexican garrison in Sonoma.
They raised the
"Bear Flag" of the California
Republic
over Sonoma. The "Bear Flag Republic" lasted
only 26 days, until the U.S. Army, led by
John Frémont, took over on July 9. The
California state flag today is based on this original Bear Flag,
and continues to contain the words "California Republic."
Commodore
John Drake Sloat ordered his naval
forces to occupy Yerba Buena (present
San
Francisco
) on July 7
and within days American forces controlled San Francisco, Sonoma,
and Sutter's
Fort
in Sacramento. The treaty ending the
Mexican-American War was signed on February 2, 1848, and Mexico
formally ceded Alta
California
(including all of present-day Northern California)
to the United States.
Gold Rush (1848-1855)
The
California Gold Rush took
place almost exclusively in Northern California from 1848–1855.
It began
on January 24, 1848, when gold was discovered
at Sutter's
Mill
in Coloma
. News of the discovery soon spread,
resulting in some 300,000 people coming to California from the
rest of the United States and abroad.
San
Francisco
grew from a tiny hamlet of tents to a boomtown, and roads, churches, schools and other
towns were built. New methods of transportation developed as
steamships came into regular service and
railroads were built.
However, the Gold Rush also had negative effects:
Native Americans were
attacked and pushed off traditional lands, and
gold mining caused environmental harm.
Population and agricultural expansion (1855-1899)
The decades following the Gold Rush brought dramatic expansion to
Northern California, both in population and economically -
particularly in agriculture. The completion of the
First Transcontinental
Railroad in 1869, with its terminus in Sacramento, meant that
Northern California's agricultural produce (and some manufactured
goods) could now be shipped economically to the rest of the United
States. In return, immigrants from the rest of the United States
(and Europe) could comfortably come to Northern California. A
network of railroads spread throughout Northern California, and in
1887, a
rail link was completed to
the
Pacific Northwest. Almost all
of these railways came under the control of the
Southern Pacific Railroad,
headquartered in San Francisco, and San Francisco continued as a
financial and cultural center.
Substantial tensions during this era included nativist sentiments
(primarily against Chinese immigrants), tensions between the
increasing power of the Southern Pacific Railroad and small
farmers, and the beginnings of the labor union movement.
Population
The population of the forty-eight counties of Northern California
has shown a steady increase over the years. The 1850 census almost
certainly undercounted the population of the area, especially
undercounting a still substantial Native American population.
The largest percentage increase outside the Gold Rush era (51%)
came in the decade of the 1940s, as the area was the destination of
many post-War veterans and their families, attracted by the
greatly-expanding industrial base and (often) by their time
stationed in Northern California during World War II.
The largest absolute
increase occurred during the decade of 1980s (over 2.1 million
person increase), attracted in part by the expansion taking place
in Silicon
Valley
.
Educational institutions
Northern
California hosts a number of the most renowned universities in the
world including highly prestigious Stanford University
, the flagship University of California campus
UC
Berkeley
, the
top-tier law school UC
Hastings
, and the
top ranked medical school UC San
Francisco. Public institutions include the University of California campuses
UC
Davis
, UC
Santa Cruz
, UC Merced
, eleven California State University
campuses Chico
State
, San Francisco State
, Fresno
State
, Humboldt State
, Sonoma
State
, San
Jose State
, the California Maritime Academy
, CSU East Bay
, CSU
Stanislaus
, Sacramento State
, and CSU
Monterey Bay
. Private institutions in the area include
the University of San Francisco
, Santa Clara University
, St.
Mary's College, Mills
College
, Northwestern Polytechnic
University and University of the Pacific
.
Parks and other protected areas
National Park System
The U.S.
National Park System
controls a large and diverse group of parks in Northern California.
The best
known is Yosemite National Park
, which is displayed on the reverse side of the
California
state quarter. Other prominent parks are the Kings
Canyon
-Sequoia National Park
complex, Redwood National Park
, Lassen Volcanic National
Park
and the largest in the contiguous forty-eight
states, Death Valley National Park
.
National Monuments and other federally protected areas
Other
areas under federal protection include Muir
Woods National Monument
, Giant Sequoia National
Monument
, Devils Postpile National
Monument
, Lava Beds National Monument
, Pinnacles National Monument
, Point Reyes National
Seashore
, the Monterey Bay National
Marine Sanctuary, and the Cordell Bank and
Gulf of
the Farallones National Marine Sanctuaries (both off the coast
of San Francisco). Included within the latter National Marine
Sanctuary is the Farallon National Wildlife
Refuge
; this National Wildlife Refuge is one of
approximately twenty-five such refuges in Northern
California. National forests occupy large
sections of Northern California, including the Shasta-Trinity
, Klamath
, Modoc
, Lassen
, Mendocino
, Eldorado
, Tahoe
, and Sequoia
national forests, among others. Included within (or
adjacent to) national forests are federally protected wilderness
areas, including the Trinity Alps
, Castle
Crags
, Granite Chief
, and Desolation
wilderness areas.
In
addition, the California Coastal National
Monument
protects all islets, reefs, and rock outcroppings
from the shore of Northern California out to a distance of 12
nautical miles (22.22 km), along the entire Northern
California coastline. In addition, the National Park Service
administers protected areas on Alcatraz Island
, the Golden
Gate
National
Recreation Area, and the Whiskeytown National
Recreation Area. The NPS also administers the Manzanar
National Historic
Site in Inyo County, and the
Rosie the Riveter/World War II Home Front National Historical
Park in the San Francisco Bay Area.
Other parks and protected areas
Counties
Regions
The following regions are entirely or partly within Northern
California:
Transportation
See also categories:
Airports

San Francisco International Airport or
SFO is the largest and busiest airport in Northern California and
second in the state and tenth in the United States.
The following airports currently have regularly scheduled
commercial service:
Railroad
Major transit organizations
Major transit ferries
Freeways
Interstates:
U.S. Routes:

State Route 120 is one of the many
highways that traverse the isolated areas of inner Northern
California
Principal State highways:
Communication
Telephone Area Codes
- 209
—
Northern San
Joaquin Valley
(Stockton
, Modesto
, and Merced
).
- 408 —
Most of Santa
Clara County
(San Jose
and Gilroy
).
- 415
—
San
Francisco
, Daly
City
, and Marin
County
. One of the three original Area Codes in
California.
- 510 —
Inner East Bay
(Oakland
, Berkeley
, Richmond
, and Fremont
). Originally part of area code 415.
- 530
— A
large northeastern section of the region including Shasta County, Lassen
County, Yuba
County
, Sutter County,
Butte
County
, and Nevada County
. Split from area code 916 in
1997-1998.
- 559
—
Southern San
Joaquin Valley
(Fresno
and Visalia
).
- 650
—
San Francisco Peninsula
(San
Mateo
, Redwood City
, and Palo Alto
). Originally part of area code 415.
- 707
—
The North Coast section of
the region from Sonoma
County
to the Oregon
border. Cities include Eureka
, Ukiah
, Santa Rosa
, Napa
, Vallejo
and Fairfield
.
- 831
—
Monterey
, San Benito
and Santa Cruz Counties
. Originally part of area code 408.
- 916
—
Sacramento County
and the Sacramento
suburbs in western Placer
and El Dorado Counties
. One of the three original area codes in
California, formerly covered all areas now within 530.
- 925
—
Outer East Bay
(Concord
, Pittsburg
, Walnut Creek
, Pleasanton
and Livermore
). Originally part of area codes 415 and
510.
Professional sports
See also
References
External links