McLean County Population

1840–2026

171.33K

2026 projection

0.1% since 2020 (increase)

050K100K150K200K1840186018801900192019401960198020002020

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 McLean County. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
2026171,326-930.05%
2025171,419-930.05%
2024171,512+5810.34%
2023170,931-1230.07%
2022171,054-2590.15%
2021171,313+1030.06%
2020171,210-620.04%
2019171,272-1,0960.64%
2018172,368-4010.23%
2017172,769-3880.22%

Showing 10 of 33 years.

McLean County Demographics

34.3median age

Median age

Female34.8 yrs
Male33.7 yrs

Adults

135,165
25,004 seniors (65+) · 18% of adults110,161 other adults

Sex

Female 51.1% · 87,701Male 48.9% · 83,855

Population by age

MaleFemale85+ years, male: 1,12785+ years, female: 1,68280–84 years, male: 1,26580–84 years, female: 1,68975–79 years, male: 1,84175–79 years, female: 2,23770–74 years, male: 3,16170–74 years, female: 3,63565–69 years, male: 3,84065–69 years, female: 4,52760–64 years, male: 4,55760–64 years, female: 4,98655–59 years, male: 4,81555–59 years, female: 4,85850–54 years, male: 4,70950–54 years, female: 4,76445–49 years, male: 4,73445–49 years, female: 4,70140–44 years, male: 5,26240–44 years, female: 5,14435–39 years, male: 5,42535–39 years, female: 5,36930–34 years, male: 5,37930–34 years, female: 5,29625–29 years, male: 5,63925–29 years, female: 5,58220–24 years, male: 10,18320–24 years, female: 10,36115–19 years, male: 6,91415–19 years, female: 7,98810–14 years, male: 5,87910–14 years, female: 5,5485–9 years, male: 4,6265–9 years, female: 4,6630–4 years, male: 4,4990–4 years, female: 4,67185+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–45K5K

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 1,716 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

McLean County Income

$79,905median household income

Median household income

$79,905

Half of households earn more, half earn less

Median earnings

$59,024

Typical yearly pay for a worker 25 or older.

Poverty rate

12.9%

About 1 in 8 residents

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

McLean County Marital Status

46% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married46%47%44%
Never married40%42%38%
Divorced9%8%11%
Widowed5%3%7%
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