Miami County Population

1840–2026

34,509

2026 projection

3.9% since 2020 (decrease)

010K20K30K40K1840186018801900192019401960198020002020

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 Miami County. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202634,509+220.06%
202534,487+220.06%
202434,465+4311.27%
202334,034-1770.52%
202234,211-6461.85%
202134,857-1,0502.92%
202035,907+4191.18%
201935,488-1640.46%
201835,652-2510.70%
201735,903-1440.40%

Showing 10 of 33 years.

Miami County Demographics

41.5median age

Median age

Female43.7 yrs
Male39.8 yrs

Adults

28,282
6,494 seniors (65+) · 23% of adults21,788 other adults

Sex

Female 45.4% · 16,231Male 54.6% · 19,481

Population by age

MaleFemale85+ years, male: 26785+ years, female: 33980–84 years, male: 39480–84 years, female: 46975–79 years, male: 50575–79 years, female: 65570–74 years, male: 84670–74 years, female: 85965–69 years, male: 1,05565–69 years, female: 1,10560–64 years, male: 1,10060–64 years, female: 1,25255–59 years, male: 1,31955–59 years, female: 96350–54 years, male: 1,26950–54 years, female: 1,13645–49 years, male: 1,43545–49 years, female: 1,05140–44 years, male: 1,50240–44 years, female: 99535–39 years, male: 1,21735–39 years, female: 84530–34 years, male: 1,36630–34 years, female: 93425–29 years, male: 1,40825–29 years, female: 88720–24 years, male: 1,35620–24 years, female: 94115–19 years, male: 1,31415–19 years, female: 1,00110–14 years, male: 1,27410–14 years, female: 1,0965–9 years, male: 9615–9 years, female: 8100–4 years, male: 8930–4 years, female: 89385+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–45005001K1K

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 357 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

Miami County Income

$61,139median household income

Median household income

$61,139

Half of households earn more, half earn less

Median earnings

$41,488

Typical yearly pay for a worker 25 or older.

Poverty rate

15.1%

About 1 in 7 residents

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

Miami County Marital Status

47% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married47%44%50%
Never married31%38%23%
Divorced15%14%17%
Widowed5%3%8%
Separated2%2%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