Knox County Population

1800–2026

515.31K

2026 projection

7.3% since 2020 (increase)

0100K200K300K400K500K600K18001850190019502000

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.
2026515,309+3,8560.75%
2025511,453+3,8560.76%
2024507,597+6,0081.20%
2023501,589+5,7621.16%
2022495,827+9,8182.02%
2021486,009+5,5371.15%
2020480,472+10,3352.20%
2019470,137+3,3500.72%
2018466,787+4,8101.04%
2017461,977+5,5671.22%

Showing 10 of 37 years.

Knox County Demographics

37.4median age

Median age

Female38.6 yrs
Male36.1 yrs

Adults

390,630
80,392 seniors (65+) · 21% of adults310,238 other adults

Sex

Female 51% · 252,122Male 49% · 242,026

Population by age

MaleFemale85+ years, male: 2,92985+ years, female: 5,56180–84 years, male: 3,61780–84 years, female: 4,98875–79 years, male: 6,68875–79 years, female: 8,43570–74 years, male: 10,65370–74 years, female: 11,94765–69 years, male: 11,59865–69 years, female: 13,97660–64 years, male: 13,80760–64 years, female: 15,97355–59 years, male: 14,79355–59 years, female: 14,78650–54 years, male: 14,98550–54 years, female: 15,27545–49 years, male: 14,55345–49 years, female: 14,62740–44 years, male: 15,39440–44 years, female: 16,45135–39 years, male: 16,07335–39 years, female: 15,89730–34 years, male: 16,72930–34 years, female: 17,05625–29 years, male: 17,46125–29 years, female: 17,57120–24 years, male: 21,72620–24 years, female: 21,43715–19 years, male: 17,32915–19 years, female: 16,80110–14 years, male: 15,69210–14 years, female: 14,1755–9 years, male: 14,0755–9 years, female: 14,1240–4 years, male: 13,9240–4 years, female: 13,04285+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–410K10K20K20K

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 4,941 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

$74,222median household income

Median household income

$74,222

Half of households earn more, half earn less

Median earnings

$50,545

Typical yearly pay for a worker 25 or older.

Poverty rate

12.2%

About 1 in 8 residents

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

Knox County Marital Status

48% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married48%50%47%
Never married34%36%32%
Divorced11%10%12%
Widowed6%3%8%
Separated1%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