Marshall County, Oklahoma Demographics 2026

Population Overview

Marshall County is located in Oklahoma with a total population of 15,628. It is the 44th most populous county out of 77 in Oklahoma. The county encompasses 8 Census-designated places.

Age Demographics

The median age in Marshall County is 42.0 years. This is 14% higher than the state median of 36.9 years.

Economy, Income & Housing

The median household income in Marshall County is $56,495. This is 11% lower than the state median of $63,603. It is also 28% lower than the national median of $78,538. The poverty rate stands at 16.5%. This is 8% higher than the state poverty rate of 15.3%. The unemployment rate is 5.4%. This is 9% higher than the state rate of 4.9%. The median home value is $139,700. Housing costs are 25% lower than the state median of $185,900. With a home-value-to-income ratio of just 2.5x, Marshall County is one of the most affordable housing markets in the area. 79.6% of occupied housing units are owner-occupied. This homeownership rate is 21% higher than the state average of 65.8%.

Race & Ethnicity

The largest racial or ethnic group in Marshall County is White (non-Hispanic), making up 63.6% of the population. Hispanic or Latino residents account for 17.5%. The Black or African American population (0.9%) is well below the state average of 6.9%. The Asian population (0.3%) is well below the state average of 2.3%.

Education

16.9% of residents aged 25 and older hold a bachelor's degree or higher. This is 39% lower than the state rate of 27.8%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 84.7%.

Data Sources & Methodology

All figures for Marshall County come from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023), with comparisons drawn against Oklahoma and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.