County Dossier

Preble County

Ohio | County

Population

40,765

Land Area

424.2 sq mi

Context

Nonmetro

Geography

County silhouette

Land Area
424.2 sq mi
Water Area
2.3 sq mi
Water Share
0.5%

Terrain Layer

Open the county terrain view inside the atlas flow.

Terra Firma

Population & Housing

Population

40,765

Density
96.1 / sq mi
Households
16,725
Housing Units
18,140
Median Age
43.3 years

Income & Economy

Median Household Income

$69,223

GDP

$1.56B

Real GDP Change-3.6%
Per Capita Income
$34,711
Personal Income
$2.19B
Personal Income Per Capita
$53,761

Classification

RUCC 6
Nonmetro

Urban population of 5,000 to 20,000, adjacent to a metro area

Relief

Min

750 ft

Mean

1,037 ft

Max

1,237 ft

Provenance

GEOID 39135 ANSI 01074080
Latitude 39.73881 Longitude -84.64476
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