Fairfield County Population

1810–2026

171.8K

2026 projection

7.7% since 2020 (increase)

050K100K150K200K1850190019502000

Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for Fairfield County. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
2026171,798+2,0461.21%
2025169,752+2,0461.22%
2024167,706+2,2161.34%
2023165,490+2,4871.53%
2022163,003+1,8571.15%
2021161,146+1,6951.06%
2020159,451+1,7481.11%
2019157,703+1,6411.05%
2018156,062+1,3440.87%
2017154,718+1,8891.24%

Showing 10 of 36 years.

Fairfield County Demographics

39.5median age

Median age

Female40.6 yrs
Male38.2 yrs

Adults

124,477
27,165 seniors (65+) · 22% of adults97,312 other adults

Sex

Female 50% · 81,673Male 50% · 81,780

Population by age

MaleFemale85+ years, male: 1,13085+ years, female: 2,05180–84 years, male: 1,42080–84 years, female: 1,87575–79 years, male: 2,09775–79 years, female: 2,54870–74 years, male: 3,40770–74 years, female: 4,03665–69 years, male: 4,12065–69 years, female: 4,48160–64 years, male: 4,67960–64 years, female: 5,49155–59 years, male: 5,80855–59 years, female: 5,14450–54 years, male: 5,39650–54 years, female: 5,29845–49 years, male: 5,25345–49 years, female: 5,17740–44 years, male: 5,30640–44 years, female: 5,61635–39 years, male: 5,79535–39 years, female: 5,49730–34 years, male: 5,06130–34 years, female: 5,09725–29 years, male: 5,03725–29 years, female: 4,52620–24 years, male: 5,15420–24 years, female: 4,36215–19 years, male: 5,66515–19 years, female: 5,12010–14 years, male: 5,96610–14 years, female: 6,1905–9 years, male: 5,6705–9 years, female: 4,6300–4 years, male: 4,8160–4 years, female: 4,53485+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–42K2K4K4K

Hover or tap an age group to see exact counts. Use the up and down arrow keys to inspect age groups.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 1,635 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

Fairfield County Income

$90,966median household income

Median household income

$90,966

Half of households earn more, half earn less

Median earnings

$57,314

Typical yearly pay for a worker 25 or older.

Poverty rate

8%

About 1 in 12 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

Fairfield County Marital Status

54% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married54%55%54%
Never married28%32%25%
Divorced11%10%13%
Widowed5%3%8%
Separated2%1%2%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201

Sources

8 sources, all from the U.S. Census Bureau

Population

American Community Survey, 2024 5-year