Grundy County Population

1850–2026

54,383

2026 projection

3.5% since 2020 (increase)

010K20K30K40K50K60K186018801900192019401960198020002020

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 Grundy County. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202654,383+3310.61%
202554,052+3310.62%
202453,721+1710.32%
202353,550+4050.76%
202253,145+1530.29%
202152,992+4540.86%
202052,538+1,5072.95%
201951,031+190.04%
201851,012+3850.76%
201750,627+3020.60%

Showing 10 of 32 years.

Grundy County Demographics

38.3median age

Median age

Female39.5 yrs
Male37.1 yrs

Adults

40,280
8,031 seniors (65+) · 20% of adults32,249 other adults

Sex

Female 49.6% · 26,410Male 50.4% · 26,809

Population by age

MaleFemale85+ years, male: 21685+ years, female: 74580–84 years, male: 39980–84 years, female: 44875–79 years, male: 69975–79 years, female: 59370–74 years, male: 1,07570–74 years, female: 1,14965–69 years, male: 1,34365–69 years, female: 1,36460–64 years, male: 1,64660–64 years, female: 1,56055–59 years, male: 1,79155–59 years, female: 1,80450–54 years, male: 1,80450–54 years, female: 1,76445–49 years, male: 1,72245–49 years, female: 1,68740–44 years, male: 1,49940–44 years, female: 1,87535–39 years, male: 1,86735–39 years, female: 1,74730–34 years, male: 2,01130–34 years, female: 1,73225–29 years, male: 1,57725–29 years, female: 1,47820–24 years, male: 1,84820–24 years, female: 1,66415–19 years, male: 1,90515–19 years, female: 1,72710–14 years, male: 1,94710–14 years, female: 1,6545–9 years, male: 1,9115–9 years, female: 1,9610–4 years, male: 1,5490–4 years, female: 1,45885+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 532 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

Grundy County Income

$92,235median household income

Median household income

$92,235

Half of households earn more, half earn less

Median earnings

$57,775

Typical yearly pay for a worker 25 or older.

Poverty rate

6%

About 1 in 17 residents

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

Grundy County Marital Status

53% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married53%54%52%
Never married29%33%25%
Divorced11%10%13%
Widowed5%2%8%
Separated2%2%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