Tehama County area

Population and density of Tehama County

The Census Bureau estimates that 64,665 people lived in Tehama County on July 1, 2025. That ranks #859 of 3,222 county equivalents nationally and #42 of 58 in California. Since the April 1, 2020 estimates base of 65,912, the population has declined by 1,247 (−1.9%), compared with −0.5% for California as a whole.

With 2,949.1 square miles of land, that is 22 people per square mile (8.5 per km²), placing Tehama County #2,257 nationally for density and #46 in California. The median county equivalent has 47 people per square mile; the California median is 112. Put another way, there are about 29 acres of land per resident.

U.S. Census Bureau, Vintage 2025 population estimates. Estimates are revised each year and are not decennial census counts. Density divides the whole population by the whole county’s land area, so it describes an average, not how settlement is distributed within the county. Population sources and methods.

Cities and towns in Tehama County

3 incorporated places lie at least partly in Tehama County. Together they are home to 23,105 people (35.7%); the other 41,560 (64.3%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Red Bluff city, with 14,404 residents in the county. Among places with at least 1,000 residents in 2020, Corning city grew fastest since then (+0.3%).

Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Tehama County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.

Metropolitan area

Tehama County is a central county of the Red Bluff, CA Micropolitan Statistical Area. Tehama County is the area’s only county equivalent, so the micro area has the same 2,949.1 square miles of land. By combined land it ranks #53 of 542 micropolitan areas, and #143 by population. It belongs to the Redding-Red Bluff, CA Combined Statistical Area.

ZIP codes

17 ZIP Code Tabulation Areas have land in Tehama County; 14 of them have most of their land inside the county, and the others mainly cover neighboring areas.

9596395973960219602296029960359605596059960619606396074960759607696078960809609096092

ZIP Code Tabulation Areas are the Census Bureau’s approximations of USPS ZIP Code service areas, from the 2020 Census relationship files. Lighter codes have less than half of their land in this county. Post-office-box and single-address ZIP Codes have no tabulation area.

Counties bordering Tehama County

Tehama County shares a land border with 6 county equivalents. It has more land than 3 of them. The largest neighbor is Shasta County (3,775.6 mi²) and the smallest is Glenn County (1,313.9 mi²). Together with its neighbors, Tehama County forms a block of 18,914.4 mi² of land, of which it holds 15.6%.

How big is Tehama County compared with U.S. states?

Tehama County has more land than 2 of the 50 states. It is about 1.5 times the land area of Delaware (1,948.6 mi²), while Connecticut, the next larger state, has 1.6 times as much land (4,842.5 mi²). California’s county land could hold about 53 areas the size of Tehama County.

Another way to picture it: the same land area would fill a square about 54.3 miles (87.4 km) on each side. Real county shapes are rarely square, so this is a scale reference rather than a width or driving distance.

State figures are the sums of each state’s county-equivalent land measurements in the same Census release, so states and counties are compared on the same basis. Published state totals can differ slightly because of rounding. Compare all states · Counties bigger than entire states.

What stands out about Tehama County?

Tehama County has more land than 3,047 of the other 3,221 county equivalents in the dataset.

A median is the middle county-equivalent measurement, not the average of the largest and smallest. All three bars use the same linear scale. Very small areas may appear as a thin sliver; the labels retain their values.

Does including water change its rank?

Using land plus water places Tehama County at #190 nationally by total area, 15 places farther from the top than its land rank. Other county equivalents gain more area when their water measurements are included.

Its water share is 0.4%, compared with a national county-equivalent median of 1.2% — 0.7 percentage points lower. This describes the statistical geography’s land/water mix, not flood exposure or developable land.

Closest positions in the national land ranking

These entries sit immediately beside Tehama County in the national ranking. They can be in different states and are not necessarily geographic neighbors.

Calculated from the same Census release as the area table. Total-area order uses original ALAND + AWATER; water shares and chart labels use published square miles. Calculation details.