South Mount Vernon, Ohio Demographics & Population 2026

A note before these figures: with a population of 589, South Mount Vernon's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.

Population Overview

South Mount Vernon is a small community located in Ohio, within Knox County. The total population is 589. It ranks as the 839th most populous out of 1,264 Census-designated places in Ohio.

Age Demographics

The median age in South Mount Vernon is 27.3 years. This is 31% lower than the state median of 39.7 years.

Economy, Income & Housing

The median household income in South Mount Vernon is $59,018. This is 17% lower than the state median of $71,389. It is also 27% lower than the national median of $80,734. The poverty rate stands at 33.1%. This is 149% higher than the state poverty rate of 13.3%. With more than one in five residents living below the poverty line, economic hardship is a significant challenge for the community. The unemployment rate is 13.9%. This is 192% higher than the state rate of 4.8%. 31.1% of occupied housing units are owner-occupied. This homeownership rate is 54% lower than the state average of 67.2%.

Race & Ethnicity

South Mount Vernon has a predominantly White (non-Hispanic) population, comprising 85.7% of all residents. Hispanic or Latino residents account for 11.0%. The Hispanic or Latino population is significantly higher than the state average (11.0% vs 4.8%).

Education

14.0% of residents aged 25 and older hold a bachelor's degree or higher. This is 55% lower than the state rate of 31.5%. Nationally, 35.7% of adults hold at least a bachelor's degree. No surveyed resident aged 25 or older reported leaving school before earning a high school diploma, though a rate of exactly 100% reflects the limits of a small sample.

Data Sources & Methodology

All demographic data for South Mount Vernon, Ohio is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Ohio state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,264 Census-designated places in Ohio. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.