Decatur County Population

1830–2026

29,401

2026 projection

0.1% since 2020 (decrease)

05K10K15K20K25K30K35K1850190019502000

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 Decatur County. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202629,401-310.11%
202529,432-310.11%
202429,463+2690.92%
202329,194+480.16%
202229,146-710.24%
202129,217-2190.74%
202029,436+2,94011.10%
201926,496-1170.44%
201826,613-1140.43%
201726,727+450.17%

Showing 10 of 34 years.

Decatur County Demographics

38.9median age

Median age

Female40.3 yrs
Male37.2 yrs

Adults

22,134
4,997 seniors (65+) · 23% of adults17,137 other adults

Sex

Female 52.1% · 15,205Male 47.9% · 13,990

Population by age

MaleFemale85+ years, male: 17785+ years, female: 45380–84 years, male: 19980–84 years, female: 44975–79 years, male: 43375–79 years, female: 37270–74 years, male: 36570–74 years, female: 71565–69 years, male: 94965–69 years, female: 88560–64 years, male: 81260–64 years, female: 1,32555–59 years, male: 1,03455–59 years, female: 67450–54 years, male: 88350–54 years, female: 91345–49 years, male: 79045–49 years, female: 90240–44 years, male: 86640–44 years, female: 1,03435–39 years, male: 81635–39 years, female: 69530–34 years, male: 88730–34 years, female: 97825–29 years, male: 96225–29 years, female: 95420–24 years, male: 1,13220–24 years, female: 86015–19 years, male: 79115–19 years, female: 1,04010–14 years, male: 1,04110–14 years, female: 1,0575–9 years, male: 9075–9 years, female: 8910–4 years, male: 9460–4 years, female: 1,00885+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–45005001K1K

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 292 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

Decatur County Income

$53,317median household income

Median household income

$53,317

Half of households earn more, half earn less

Median earnings

$42,811

Typical yearly pay for a worker 25 or older.

Poverty rate

22%

About 1 in 5 residents

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

Decatur County Marital Status

39% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married39%41%37%
Never married35%37%33%
Divorced13%13%13%
Widowed8%4%11%
Separated5%5%6%

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