Mount Aetna, Maryland Demographics & Population 2026

A note before these figures: with a population of 637, Mount Aetna'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

Mount Aetna is a small community located in Maryland, within Washington County. The total population is 637. It ranks as the 367th most populous out of 527 Census-designated places in Maryland.

Age Demographics

The median age in Mount Aetna is 48.5 years. This is 23% higher than the state median of 39.4 years.

Economy, Income & Housing

The median household income in Mount Aetna is $145,662. This is 40% higher than the state median of $103,678. It is also 80% higher than the national median of $80,734. The poverty rate stands at 3.8%. This is 60% lower than the state poverty rate of 9.4%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 0.9%. This is 82% lower than the state rate of 4.9%. The median home value is $462,000. Housing costs are 10% higher than the state median of $419,900. The home-value-to-income ratio is 3.2x. 74.9% of occupied housing units are owner-occupied. This homeownership rate is 11% higher than the state average of 67.6%.

Race & Ethnicity

The largest racial or ethnic group in Mount Aetna is White (non-Hispanic), making up 59.3% of the population. Black or African American residents account for 19.9%.

Education

52.1% of residents aged 25 and older hold a bachelor's degree or higher. This is 20% higher than the state rate of 43.5%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 88.7%. Notably, 36.2% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for Mount Aetna, Maryland 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 Maryland state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 527 Census-designated places in Maryland. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.