Stephenson County Population

1840–2026

43,018

2026 projection

3.5% since 2020 (decrease)

010K20K30K40K50K1840186018801900192019401960198020002020

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 Stephenson County. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202643,018-2020.47%
202543,220-2020.47%
202443,422-950.22%
202343,517-2030.46%
202243,720-4320.98%
202144,152-4180.94%
202044,570+1990.45%
201944,371-3310.74%
201844,702-2960.66%
201744,998-5141.13%

Showing 10 of 33 years.

Stephenson County Demographics

45.3median age

Median age

Female47.3 yrs
Male43.2 yrs

Adults

34,472
10,671 seniors (65+) · 31% of adults23,801 other adults

Sex

Female 51.1% · 22,364Male 48.9% · 21,404

Population by age

MaleFemale85+ years, male: 49485+ years, female: 1,15680–84 years, male: 49680–84 years, female: 55675–79 years, male: 88175–79 years, female: 93670–74 years, male: 1,12670–74 years, female: 1,37965–69 years, male: 1,72565–69 years, female: 1,92260–64 years, male: 1,61460–64 years, female: 1,78555–59 years, male: 1,50255–59 years, female: 1,48250–54 years, male: 1,31550–54 years, female: 1,39245–49 years, male: 1,14345–49 years, female: 1,10040–44 years, male: 1,30640–44 years, female: 1,08735–39 years, male: 83035–39 years, female: 1,39830–34 years, male: 1,35930–34 years, female: 1,08725–29 years, male: 98825–29 years, female: 1,14620–24 years, male: 1,29320–24 years, female: 1,12815–19 years, male: 1,34515–19 years, female: 1,18110–14 years, male: 1,58010–14 years, female: 1,3675–9 years, male: 1,2135–9 years, female: 1,1520–4 years, male: 1,1940–4 years, female: 1,11085+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–45005001K1K1.5K1.5K

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 438 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

Stephenson County Income

$64,043median household income

Median household income

$64,043

Half of households earn more, half earn less

Median earnings

$44,766

Typical yearly pay for a worker 25 or older.

Poverty rate

13.9%

About 1 in 7 residents

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

Stephenson County Marital Status

50% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married50%53%47%
Never married30%33%27%
Divorced12%10%13%
Widowed7%3%10%
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