County Dossier

Miami County

Ohio | County

Population

110,296

Land Area

406.6 sq mi

Context

Metro

Geography

County silhouette

Land Area
406.6 sq mi
Water Area
3.1 sq mi
Water Share
0.7%

Terrain Layer

Open the county terrain view inside the atlas flow.

Terra Firma

Population & Housing

Population

110,296

Density
271.3 / sq mi
Households
44,906
Housing Units
47,226
Median Age
41.3 years

Income & Economy

Median Household Income

$76,817

GDP

$6.18B

Real GDP Change+1.1%
Per Capita Income
$40,297
Personal Income
$6.97B
Personal Income Per Capita
$62,303

Classification

RUCC 2
Metro

Counties in metro areas of 250,000 to 1 million population

Relief

Min

751 ft

Mean

949 ft

Max

1,160 ft

Provenance

GEOID 39109 ANSI 01074067
Latitude 40.05333 Longitude -84.22841
Canonical 2025 Gazetteer ACS ACS 2020-2024 5-year BEA BEA county 2024 release (2026-02-05) BLS BLS LAUS 2024 annual average USDA USDA RUCC 2023 USGS USGS 3DEP published as of 2026-03-23