DeKalb Population

1880–2026

40,424

2026 projection

0.5% since 2020 (increase)

010K20K30K40K50K18801900192019401960198020002020

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 DeKalb. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202640,424-430.11%
202540,467+3960.99%
202440,071+990.25%
202339,972-470.12%
202240,019-8101.98%
202140,829+5871.46%
202040,242-2,7086.31%
201942,950+1490.35%
201842,801-700.16%
201742,871+470.11%

Showing 10 of 30 years.

DeKalb Demographics

26.1median age

Median age

Female26.4 yrs
Male25.6 yrs

Adults

32,848
4,472 seniors · 14%28,376 other adults

Sex

Female 50.9% · 20,588Male 49.1% · 19,855

Population by age

MaleFemale85+ years, male: 24385+ years, female: 60780–84 years, male: 14780–84 years, female: 24875–79 years, male: 31175–79 years, female: 55870–74 years, male: 47770–74 years, female: 49565–69 years, male: 62465–69 years, female: 76260–64 years, male: 72660–64 years, female: 74155–59 years, male: 78555–59 years, female: 89350–54 years, male: 77150–54 years, female: 46545–49 years, male: 1,02045–49 years, female: 97540–44 years, male: 1,14340–44 years, female: 1,11235–39 years, male: 1,15235–39 years, female: 98030–34 years, male: 1,57230–34 years, female: 1,16225–29 years, male: 1,09425–29 years, female: 1,73720–24 years, male: 4,15420–24 years, female: 4,63015–19 years, male: 2,40015–19 years, female: 2,35910–14 years, male: 1,05210–14 years, female: 1,0075–9 years, male: 1,1715–9 years, female: 9840–4 years, male: 1,0130–4 years, female: 87385+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 404 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

DeKalb Income

$46,481median household income

Median household income

$46,481

Half of households earn more, half earn less

Median earnings

$40,432

Typical yearly pay for a worker 25 or older.

Poverty rate

24.9%

About 1 in 4 residents

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

DeKalb Marital Status

28% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married28%31%25%
Never married58%59%57%
Divorced10%8%11%
Widowed5%2%7%
Separated<1%<1%<1%

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

Sources

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

Population

American Community Survey, 2024 5-year