How this list was compiled: Items made on 2026-09-26; names, ids and accepted spellings are Natural Earth's. Licence: public domain (work of the United States government, 17 U.S.C. 105): https://www2.census.gov/geo/pdfs/maps-data/data/tiger/tgrshp2023/TGRSHP2023_TechDoc_Ch1.pdf; public domain (Natural Earth terms of use: https://www.naturalearthdata.com/about/terms-of-use/)
The drawing: Drawn for this site from U.S. Census Bureau 2023 cartographic boundary file cb_2023_us_county_5m (scale 1:5,000,000), https://www2.census.gov/geo/tiger/GENZ2023/shp/cb_2023_us_county_5m.zip, downloaded 2026-09-19. Surrounding land from U.S. Census Bureau 2023 cartographic boundary file cb_2023_us_state_5m (scale 1:5,000,000), https://www2.census.gov/geo/tiger/GENZ2023/shp/cb_2023_us_state_5m.zip, downloaded 2026-09-19 and from Natural Earth 5.1.2, ne_10m_admin_0_countries_lakes (scale 1:10,000,000), https://raw.githubusercontent.com/nvkelso/natural-earth-vector/v5.1.2/geojson/ne_10m_admin_0_countries_lakes.geojson, downloaded 2026-09-19. Albers equal-area conic projection, central meridian 120.3°W, standard parallels 34.1°N and 40.4°N. Outlines simplified; small islands are left out. Licence: public domain (work of the United States government, 17 U.S.C. 105): https://www2.census.gov/geo/pdfs/maps-data/data/tiger/tgrshp2023/TGRSHP2023_TechDoc_Ch1.pdf; public domain (Natural Earth terms of use: https://www.naturalearthdata.com/about/terms-of-use/)
How it works
This California county quiz asks all 58 counties of California on a blank map: Find it names one to tap, Name it lights one for you to name, and Study shows them all.
Read the full guide
3 areas of California
The areas under Start from split them into Northern California (26), Central California (22) and Southern California (10), so a round can be one part of the state at a time.
Typing a name
Under Name it you can type Alameda or Alameda County: the word County is optional, and accents or capitals do not matter.
Learn the counties around Sacramento first, then work out to the borders with Oregon, Nevada and Arizona.
Questions and answers
How many counties are in the California county quiz?
All 58 of California, from Alameda County to Yuba County, each asked once per round in a new order.
Where is Sacramento County on the map?
Sacramento County, around the capital, Sacramento, is in the Northern California area; Los Angeles County, around Los Angeles, has the most people.
Which county names does California share with Oregon?
One: Lake are names in both states; here every one is the California county, so a name alone is enough.
Which county is the hardest to tap?
San Francisco, the smallest shape on the map, so it and no other carry a numbered ring you tap instead. San Bernardino is the biggest shape and the easiest.