St. Marys city, Kansas Demographics & Population 2026

Population Overview

St. Marys city is a small community located in Kansas. The total population is 2,795. It ranks as the 96th most populous out of 726 cities and towns in Kansas.

Age Demographics

The median age in St. Marys city is 25.8 years. This is 31% lower than the state median of 37.2 years. With 28.4% of the population under 18, St. Marys city has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in St. Marys city is $71,723. This is 1% lower than the state median of $72,639. Compared to the national median of $78,538, household income here is 9% lower. The poverty rate stands at 7.9%. This is 32% lower than the state poverty rate of 11.5%. The unemployment rate is 3.0%. This is 23% lower than the state rate of 3.9%. The median home value is $196,300. Housing costs are 3% lower than the state median of $203,400. With a home-value-to-income ratio of just 2.7x, St. Marys city is one of the most affordable housing markets in the area. 64.6% of occupied housing units are owner-occupied. This homeownership rate is 3% lower than the state average of 66.9%.

Race & Ethnicity

The largest racial or ethnic group in St. Marys city is White (non-Hispanic), making up 83.5% of the population. Hispanic or Latino residents account for 8.2%. The Black or African American population (0.5%) is well below the state average of 5.3%. The Asian population (1.0%) is well below the state average of 2.9%.

Education

21.0% of residents aged 25 and older hold a bachelor's degree or higher. This is 40% lower than the state rate of 35.2%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 97.0%.

Data Sources & Methodology

All demographic data for St. Marys city, Kansas is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. Comparisons are made against Kansas state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 726 Census-designated places in Kansas. For official data, visit data.census.gov.