County Census Records
California Counties
59 counties with population data from the decennial US Census, 1790 to 2020.
59 counties
Population as of 2020 census
Alameda
1,682,353
Alpine
1,204
Amador
40,474
Butte
211,632
Calaveras
45,292
Colusa
21,839
Contra Costa
1,165,927
Del Norte
27,743
El Dorado
191,185
Fresno
1,008,654
Glenn
28,917
Humboldt
136,463
Imperial
179,702
Inyo
19,016
Kern
909,235
Kings
152,486
Klamath
1,686
Lake
68,163
Lassen
32,730
Los Angeles
10,014,009
Madera
156,255
Marin
262,321
Mariposa
17,131
Mendocino
91,601
Merced
281,202
Modoc
8,700
Mono
13,195
Monterey
439,035
Napa
138,019
Nevada
102,241
Orange
3,186,989
Placer
404,739
Plumas
19,790
Riverside
2,418,185
Sacramento
1,585,055
San Benito
64,209
San Bernardino
2,181,654
San Diego
3,298,634
San Francisco
873,965
San Joaquin
779,233
San Luis Obispo
282,424
San Mateo
764,442
Santa Barbara
448,229
Santa Clara
1,936,259
Santa Cruz
270,861
Shasta
182,155
Sierra
3,236
Siskiyou
44,076
Solano
453,491
Sonoma
488,863
Stanislaus
552,878
Sutter
99,633
Tehama
65,829
Trinity
16,112
Tulare
473,117
Tuolumne
55,620
Ventura
843,843
Yolo
216,403
Yuba
81,575
Unlimited access
Everything a full the United States report reveals
Pick any location and Aubrey pulls together 18 strands of its history, each drawn from the record:
Overview
An interactive map of the location with historic sites, battles and Native heritage plotted, and its full story era by era.
The Land
The historic sites and place names around the location, and how this land was settled and used.
Geology
The bedrock beneath the site, its age and rock type, reaching back millions of years.
LiDAR Terrain
Laser-scanned terrain that reveals earthworks and old features hidden in the landscape.
Conflict & War
The battles, raids and skirmishes fought near here, across every era of American conflict.
The Civil War
The Civil War on this ground, 1861 to 1865: who held it, and the battles, camps and regiments nearby.
The Soldiers
The men who marched from here in the Civil War, named and traced where the record allows.
Native Heritage
The Native nations who held this land, mapped across time from before European contact to today.
Settlement
Who claimed and held this ground, from Indigenous homelands through the colonial powers to the United States.
The Community
How the town grew, who came, and what kind of place it became, traced through the census record.
Rivers & Rail
The rivers, canals and railroads that connected this place between 1830 and 1911.
Notable People
The people born, buried or genuinely tied to this exact place, with their stories.
Historical Maps
Historic maps of the location layered over how it looks today.
Finds & Access
Museum objects tied to the area, and the laws on searching, collecting and access here.
Literature
The old books, county histories and archives that mention this place, quoted with their sources.
Spotlight
A deep dive into the most remarkable, lesser-known history of the place, traced back to the record.
Points of Interest
The most significant historic sites and landmarks near the location, and why they matter.
Timeline
The whole story of the location told era by era, from first peoples to the present day.
First month just $5.99, then $11.99 a month. Unlimited locations, cancel anytime.
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Aubrey Research
Research the history of any US location
Aubrey searches federal archives, archaeological records, historic registers, and primary sources to build a full historical report for any address or place in the United States.