Allen County, Kansas Demographics 2026

Population Overview

Allen County is located in Kansas with a total population of 12,483. It is the 36th most populous county out of 105 in Kansas. The county encompasses 9 Census-designated places.

Age Demographics

The median age in Allen County is 41.2 years. This is 10% higher than the state median of 37.4 years.

Economy, Income & Housing

The median household income in Allen County is $60,689. This is 18% lower than the state median of $74,275. It is also 25% lower than the national median of $80,734. The poverty rate stands at 9.9%. This is 12% lower than the state poverty rate of 11.3%. The unemployment rate is 7.9%. This is 103% higher than the state rate of 3.9%. The median home value is $107,600. Housing costs are 50% lower than the state median of $217,200. With a home-value-to-income ratio of just 1.8x, Allen County is one of the most affordable housing markets in the area. 75.4% of occupied housing units are owner-occupied. This homeownership rate is 12% higher than the state average of 67.2%.

Race & Ethnicity

Allen County has a predominantly White (non-Hispanic) population, comprising 88.5% of all residents. Hispanic or Latino residents account for 4.3%. The Hispanic or Latino population (4.3%) is well below the state average of 13.6%. The Asian population (0.4%) is well below the state average of 2.9%.

Education

22.4% of residents aged 25 and older hold a bachelor's degree or higher. This is 37% lower than the state rate of 35.6%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 94.2%.

Data Sources & Methodology

All figures for Allen County come from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates, with comparisons drawn against Kansas 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.