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Fairfield population

Fairfield, California had an estimated 122,489 residents on July 1, 2025, the 253rd-largest city in the US. That is up 16.3% since the 2010 Census and up 27.3% since 2000.

FairfieldCaliforniaPop. 122,489
Population, July 2025
122,489+2.1% since April 2020
People per sq mile
2,94541.6 sq mi of land
Median age
36.914.9% are 65 or older
Households with kids
36%with anyone under 18

Population by year, 2000 to 2025

81k91k102k112k122k2000: 96,21320002001: 99,1522002: 100,59920022003: 101,0992004: 101,77120042005: 101,9392006: 102,42820062007: 102,8182008: 103,42320082009: 104,2232010: 105,32120102011: 106,4612012: 107,76420122013: 109,3112014: 111,17520142015: 112,7322016: 114,40820162017: 116,1442018: 117,08820182019: 117,4682020: 119,91720202021: 120,0332022: 120,22020222023: 121,1852024: 122,31320242025: 122,4892025
Darker bars are the April 2000, 2010 and 2020 benchmarks; the rest are July 1 estimates. Source: US Census Bureau population estimates (intercensal 2000-2010, Vintage 2020 and Vintage 2025).
YearPopulationChangeBasis
2025122,489+176Estimate, July 1
2024122,313+1,128Estimate, July 1
2023121,185+965Estimate, July 1
2022120,220+187Estimate, July 1
2021120,033+116Estimate, July 1
2020119,917+2,449April 2020 estimates base
2019117,468+380Estimate, July 1
2018117,088+944Estimate, July 1
2017116,144+1,736Estimate, July 1
2016114,408+1,676Estimate, July 1
2015112,732+1,557Estimate, July 1
2014111,175+1,864Estimate, July 1
2013109,311+1,547Estimate, July 1
2012107,764+1,303Estimate, July 1
2011106,461+1,140Estimate, July 1
2010105,321+1,0982010 Census (April 1)
2009104,223+800Estimate, July 1
2008103,423+605Estimate, July 1
2007102,818+390Estimate, July 1
2006102,428+489Estimate, July 1
2005101,939+168Estimate, July 1
2004101,771+672Estimate, July 1
2003101,099+500Estimate, July 1
2002100,599+1,447Estimate, July 1
200199,152+2,939Estimate, July 1
200096,213April 2000 estimates base

Year-to-year changes across 2010 and 2020 mix census counts with estimates, so small jumps at those years are partly method changes.

Frequently asked questions

What is the population of Fairfield in 2025?

The Census Bureau estimates Fairfield had 122,489 residents on July 1, 2025, making it the 253rd-largest city in the US.

Is Fairfield growing?

Yes. Fairfield has grown 16.3% since the 2010 Census (105,321 people), and grown 2.1% since 2020.

What was the population of Fairfield in 2000?

About 96,213 (the Census Bureau's April 2000 estimates base). By the 2010 Census it was 105,321.

How dense is Fairfield?

Fairfield has about 2,945 people per square mile of land (41.6 square miles).

More about Fairfield

See cost of living, jobs and commutes in Fairfield, Fairfield weather by month, or every Fairfield ZIP code. For the biggest cities in the country, see the largest US cities.