Miami County, Ohio Demographics 2026

Population Overview

Miami County is located in Ohio with a total population of 109,549. It is the 25th most populous county out of 88 in Ohio. The county encompasses 3 Census-designated places.

Age Demographics

The median age in Miami County is 41.1 years. This is 4% higher than the state median of 39.6 years.

Economy, Income & Housing

The median household income in Miami County is $74,175. This is 6% higher than the state median of $69,680. Compared to the national median of $78,538, household income here is 6% lower. The poverty rate stands at 8.6%. This is 35% lower than the state poverty rate of 13.2%. The unemployment rate is 3.6%. This is 25% lower than the state rate of 4.9%. The median home value is $209,200. Housing costs are 5% higher than the state median of $199,200. With a home-value-to-income ratio of just 2.8x, Miami County is one of the most affordable housing markets in the area. 73.4% of occupied housing units are owner-occupied. This homeownership rate is 10% higher than the state average of 67.0%.

Race & Ethnicity

Miami County has a predominantly White (non-Hispanic) population, comprising 90.5% of all residents. Hispanic or Latino residents account for 2.1%. The Black or African American population (2.0%) is well below the state average of 12.1%. The Hispanic or Latino population (2.1%) is well below the state average of 4.6%.

Education

24.9% of residents aged 25 and older hold a bachelor's degree or higher. This is 19% lower than the state rate of 30.9%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 92.8%.