---
type: Jurisdiction
title: "St. Mary's County, MD"
classification: county
fips: "24037"
state: "MD"
demographics:
  population: 115126
  population_under_18: 27549
  population_18_64: 71433
  population_65_plus: 16144
  median_household_income: 119446
  poverty_rate: 7.98
  homeownership_rate: 73.17
  unemployment_rate: 3.56
  median_home_value: 407600
  gini_index: 0.4087
  vacancy_rate: 8.51
  race_white: 82070
  race_black: 16847
  race_asian: 3062
  race_native: 130
  hispanic: 7072
  bachelors_plus: 40882
sources:
  - field: demographics
    source: Census ACS 2023
confidence: official
tags: [jurisdiction, county, md]
timestamp: "2026-07-03"
---

# St. Mary's County, MD

County jurisdiction.

## Demographics (ACS 2023)

| Measure | Value |
| --- | --- |
| Population | 115126 |
| Under 18 | 27549 |
| 18–64 | 71433 |
| 65+ | 16144 |
| Median household income | 119446 |
| Poverty rate | 7.98 |
| Homeownership rate | 73.17 |
| Unemployment rate | 3.56 |
| Median home value | 407600 |
| Gini index | 0.4087 |
| Vacancy rate | 8.51 |
| White | 82070 |
| Black | 16847 |
| Asian | 3062 |
| Native | 130 |
| Hispanic/Latino | 7072 |
| Bachelor's or higher | 40882 |

## Source

- demographics: Census ACS 2023