Miami County, Ohio Population 2026

Updated April 2026 · US Census ACS 2023 5-Year Estimates · 25th-largest in Ohio

The population of Miami County, Ohio is 109,549 as of the 2023 American Community Survey, making it the 25th-largest county in Ohio. The median household income is $74,175, the median home value is $209,200, and the median age is 41.1.

The population of Miami County has grown 9.2% since 2010 (102,487 → 111,950), a +0.63% annualized rate.

Miami County within Ohio · Source: US Census TIGER/Line via us-atlas

109,549

Population

+0.63%

Annual growth

269

People / sq mi

$74,175

Median Income

$209,200

Median Home Value

Miami County covers 407 sq mi of land at 269.4 people per square mile.

About Miami County, OH

Miami County is a county in Ohio with a population of 109,549. It ranks #25 among counties in Ohio by population. The median age is 41.1, older than the national median. The population is 49.7% male and 50.3% female.

The median household income in Miami County is $74,175, near the US median of $74,580. 5.7% of residents live below the federal poverty level. Home values sit at a median of $209,200, with monthly rent averaging $942. The homeownership rate of 73.4% is higher than the national rate of 64.8%.

Educational attainment in Miami County reflects 24.9% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 9.0% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 21.4 minutes each way.

Miami County Population History (2010-2024)

The county of Miami County had a population of 102,487 in 2010 and 111,950 in 2024, a 9.2% growth over 14 years. The peak was 111,950 in 2024. Average annual growth rate: 0.63%.

111,950

Population (2024)

102,487

Population (2010)

111,950

Peak (2024)

0.63%

Avg Annual Growth

Year	Population	Change	Annual %	Source
2010	102,487	-	-	estimate
2011	102,742	+255	+0.25%	estimate
2012	102,947	+205	+0.20%	estimate
2013	103,228	+281	+0.27%	estimate
2014	103,876	+648	+0.63%	estimate
2015	104,100	+224	+0.22%	estimate
2016	104,553	+453	+0.44%	estimate
2017	105,215	+662	+0.63%	estimate
2018	106,091	+876	+0.83%	estimate
2019	106,995	+904	+0.85%	estimate
2020	108,962	+1,967	+1.84%	estimate
2021	109,426	+464	+0.43%	estimate
2022	110,245	+819	+0.75%	estimate
2023	110,898	+653	+0.59%	estimate
2024	111,950	+1,052	+0.95%	estimate

Race & Ethnicity

White	91.2%
Black or African American	2.1%
Asian	0.0%
Hispanic or Latino (any race)	0.7%
Two or More Races	0.0%

Age & Sex

41.1

Median Age

50.3%

Female

49.7%

Male

19.1%

Age 65+

Age Distribution

Under 5

5.7%

5–9

5.7%

10–14

7.4%

15–19

6.1%

20–24

5.4%

25–34

11.3%

35–44

13.0%

45–54

12.5%

55–59

6.9%

60–64

6.7%

65–74

11.4%

75–84

5.7%

85+

2.0%

Children (under 15): 18.8% · Seniors (65+): 19.1%

Income & Poverty

Median household income	$74,175+$4,495 vs state
Mean household income	$94,300
Per-capita income	$39,046
Poverty rate	5.7%-3.5% vs state
Unemployment rate	2.3%
Employment-to-population	61.6%

Top Industries by Employment

Manufacturing

24.6%

Professional & business services

19.6%

Finance & real estate

8.8%

Education & health care

7.2%

Retail trade

6.0%

Construction

5.5%

Arts, entertainment & food

5.4%

Information

4.2%

The largest employment sector in Miami County is manufacturing, accounting for 24.6% of workers.

How residents commute

0.2%

Drive alone

1.4%

Carpool

81.1%

Public transit

9.0%

Work from home

21.4 min

Avg commute

Housing

$209,200+$10,000 vs state

Median home value

$942

Median rent

73.4%

Homeownership rate

47,028

Total housing units

94.8%

Occupied

5.2%

Vacant

26.6%

Renter-occupied

Social & access

95.0%

With health insurance

94.5%

With broadband internet

16.3%

Foreign-born

7.8%

Veterans (18+)

12.6%

With a disability

96.5%

Speak language other than English at home

Education

92.8%

High School+

24.9%

Bachelor's+

Largest cities in Ohio

Columbus (906,480)Cleveland (367,523)Cincinnati (309,595)Toledo (268,461)Akron (189,526)Dayton (136,741)Parma (80,131)Canton (70,105)Lorain (65,207)Hamilton (63,124)All Ohio cities →

Other counties in Ohio

Franklin County (1,321,635)Cuyahoga County (1,249,418)Hamilton County (827,878)Summit County (538,087)Montgomery County (535,528)Lucas County (428,748)Butler County (389,910)Stark County (373,764)Lorain County (314,588)Warren County (246,364)All Ohio counties →

Part of Ohio

Ohio demographic profile All Ohio data →

Metro areas in Ohio

Cincinnati (2,255,257)Cleveland (2,171,978)Columbus (2,151,847)Dayton (813,608)Akron (699,508)Toledo (602,977)Youngstown (428,430)Canton (400,495)All US metros →

County rankings

US Counties by Population Richest US Counties by Median Household Income Expensive US Counties by Home Value Educated US Counties Counties With Highest Poverty Rates Youngest US Counties by Median Age Oldest US Counties by Median Age Cheapest US Counties by Median Home Value Racially Diverse US Counties Counties With Largest Hispanic Population All rankings →

Frequently Asked Questions

Miami County, Ohio has a population of 109,549 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 25th-largest county in Ohio. Population density is 269 people per square mile.

The population of Miami County has grown 9.2% since 2010 (102,487 → 111,950), a +0.63% annualized rate.

The median household income in Miami County, Ohio is $74,175, with mean (average) household income of $94,300 and per-capita income of $39,046. 5.7% of residents live below the federal poverty level.

In Miami County, the largest racial and ethnic groups are White (91.2%), Black or African American (2.1%), Hispanic or Latino (0.7%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.

The median age in Miami County, Ohio is 41.1 years. Residents are 50.3% female and 49.7% male.

The median home value in Miami County is $209,200 and median monthly rent is $942. 73.4% of occupied housing units are owner-occupied. The county has 47,028 total housing units, 5.2% of which are vacant.

The largest employment sector in Miami County, Ohio is manufacturing, employing 24.6% of workers. The unemployment rate is 2.3%.

Columbus is among the largest cities associated with Miami County, Ohio, with a population of 906,480.