Knox County Population

1830–2026

47,570

2026 projection

4.5% since 2020 (decrease)

010K20K30K40K50K60K70K1850190019502000

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 Knox County. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202647,570-1970.41%
202547,767-1970.41%
202447,964-2270.47%
202348,191-4710.97%
202248,662-6441.31%
202149,306-5061.02%
202049,812+1430.29%
201949,669-3390.68%
201850,008-5931.17%
201750,601-3300.65%

Showing 10 of 34 years.

Knox County Demographics

42.6median age

Median age

Female44.3 yrs
Male40.9 yrs

Adults

39,139
10,907 seniors (65+) · 28% of adults28,232 other adults

Sex

Female 49% · 24,053Male 51% · 24,993

Population by age

MaleFemale85+ years, male: 48185+ years, female: 75880–84 years, male: 59280–84 years, female: 72275–79 years, male: 93075–79 years, female: 1,26570–74 years, male: 1,25170–74 years, female: 1,37865–69 years, male: 1,70465–69 years, female: 1,82660–64 years, male: 1,73060–64 years, female: 1,73255–59 years, male: 1,48755–59 years, female: 1,58450–54 years, male: 1,49050–54 years, female: 1,35045–49 years, male: 1,60345–49 years, female: 1,28940–44 years, male: 1,48840–44 years, female: 1,55235–39 years, male: 1,54835–39 years, female: 1,19930–34 years, male: 1,49330–34 years, female: 1,16625–29 years, male: 1,44425–29 years, female: 1,22320–24 years, male: 1,87620–24 years, female: 1,47115–19 years, male: 1,63315–19 years, female: 1,59410–14 years, male: 1,55510–14 years, female: 9655–9 years, male: 1,3015–9 years, female: 1,7230–4 years, male: 1,3870–4 years, female: 1,25685+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 490 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

Knox County Income

$57,030median household income

Median household income

$57,030

Half of households earn more, half earn less

Median earnings

$43,784

Typical yearly pay for a worker 25 or older.

Poverty rate

14.6%

About 1 in 7 residents

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

Knox County Marital Status

44% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married44%43%45%
Never married35%41%29%
Divorced12%11%14%
Widowed8%4%12%
Separated<1%1%<1%

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