County research and study

Maryland county reference

24 counties and county equivalents in Maryland. Search names or FIPS codes, compare Census geography and keep the original sources with your work.

• Allegany County

  Maryland · FIPS 24001

  66,848 residents · 2025 estimate

• Anne Arundel County

  Maryland · FIPS 24003

  603,380 residents · 2025 estimate

• Baltimore city

  Maryland · FIPS 24510

  569,997 residents · 2025 estimate

• Baltimore County

  Maryland · FIPS 24005

  847,650 residents · 2025 estimate

• Calvert County

  Maryland · FIPS 24009

  94,484 residents · 2025 estimate

• Caroline County

  Maryland · FIPS 24011

  34,116 residents · 2025 estimate

• Carroll County

  Maryland · FIPS 24013

  176,677 residents · 2025 estimate

• Cecil County

  Maryland · FIPS 24015

  107,131 residents · 2025 estimate

• Charles County

  Maryland · FIPS 24017

  176,593 residents · 2025 estimate

• Dorchester County

  Maryland · FIPS 24019

  33,628 residents · 2025 estimate

• Frederick County

  Maryland · FIPS 24021

  302,883 residents · 2025 estimate

• Garrett County

  Maryland · FIPS 24023

  28,370 residents · 2025 estimate

• Harford County

  Maryland · FIPS 24025

  266,446 residents · 2025 estimate

• Howard County

  Maryland · FIPS 24027

  339,183 residents · 2025 estimate

• Kent County

  Maryland · FIPS 24029

  19,565 residents · 2025 estimate

• Montgomery County

  Maryland · FIPS 24031

  1,074,582 residents · 2025 estimate

• Prince George's County

  Maryland · FIPS 24033

  970,374 residents · 2025 estimate

• Queen Anne's County

  Maryland · FIPS 24035

  54,448 residents · 2025 estimate

• Somerset County

  Maryland · FIPS 24039

  24,973 residents · 2025 estimate

• St. Mary's County

  Maryland · FIPS 24037

  116,692 residents · 2025 estimate

• Talbot County

  Maryland · FIPS 24041

  38,238 residents · 2025 estimate

• Washington County

  Maryland · FIPS 24043

  157,731 residents · 2025 estimate

• Wicomico County

  Maryland · FIPS 24045

  106,899 residents · 2025 estimate

• Worcester County

  Maryland · FIPS 24047

  54,459 residents · 2025 estimate

Use the county data

Use a county profile as a source-reading exercise or the geographic context for your own research. Keep the county FIPS identifier with your notes so that similarly named places in different states are not mixed.

The figures describe the county; they are not an evaluation of schools or an estimate of educational outcomes.

Geography: 2025 U.S. Census Gazetteer. Population: Vintage 2025 estimates, July 1, 2025. County equivalents include parishes, boroughs, independent cities and planning regions. Puerto Rico population is not supplied by this population file.