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Frederick County
countyFrederick County, Maryland
Overview
- Classification
- County
- FIPS Code
- 24021
- Country
- United States
- County
- County
Geography
- Region
- Mid-Atlantic, straddling the Piedmont Plateau Region and the Appalachian Mountains
- Total Area
- 667 sq mi
- Land Area
- 660 sq mi
- Water Area
- 7.2 sq mi
- Climate
- Frederick County experiences a temperate climate with four distinct seasons. Summers are typically warm and humid, while winters are moderately cold.
- Notable Features
- Catoctin Mountain · South Mountain · Middletown Valley · Monocacy River Valley · Potomac River (southern edge)
- Neighboring Areas
- Adams County, Pennsylvania (north) · Carroll County (east) · Montgomery County (south) · Loudoun County, Virginia (southwest) · Washington County (west) · Franklin County, Pennsylvania (northwest)
Demographics
- Population (2020)
- 271,717
- Est. Population (2024)
- 299,317
- Median Age
- 38.9
- Median Income
- $120,458
- Poverty Rate
- 4.5%
- Racial & Ethnic Composition
- White (67.3%), Hispanic (12.3%), Black (9.9%)
Governance
- Government Type
- Charter County
- Governing Body
- County Council
- Body Size
- 7 members
- School District
- Frederick County Public Schools
- Municipal Services
- Fire and Rescue Services · Law Enforcement · Parks and Recreation · Public Works · Utilities · Schools
U.S. Congress
Alsobrooks, Angela D.D
U.S. SenatorVan Hollen, ChrisD
U.S. RepresentativeHarris, AndyR
U.S. Representative - District 1Olszewski, JohnnyD
U.S. Representative - District 2Elfreth, SarahD
U.S. Representative - District 3Ivey, GlennD
U.S. Representative - District 4Hoyer, Steny H.D
U.S. Representative - District 5McClain Delaney, AprilD
U.S. Representative - District 6Mfume, KweisiD
U.S. Representative - District 7Raskin, JamieD
U.S. Representative - District 8Economy
- Unemployment Rate
- 3.1% (2025)
- Economic Profile
- Fastest-growing county in Maryland · Dynamic economy attracting top-tier companies · Pro-business climate
- Employment Sectors
- Life Sciences · Technology · Manufacturing · Healthcare · Financial Services · Tourism · Professional Services
- Major Employers
- Fort Detrick · Frederick Health · Leidos Biomedical · Frederick National Lab · AstraZeneca · Lonza · Thermo Fisher Scientific
Education
- Schools
- 69
- Students
- 47,681
- Teachers
- 2,889
- Student-Teacher Ratio
- 16:1
- School Districts
- Frederick County Public Schools (FCPS)
- Colleges & Universities
- Frederick Community College · Hood College · Mount St. Mary's University
Infrastructure
- Transportation
- Interstates 70 and 270 · U.S. Routes 15, 40, and 340 · MARC Train System · Frederick Municipal Airport
- Utilities
- Municipal water · Municipal power · Fiber/broadband
- Major Facilities
- Frederick Health Hospital · Courthouse · Fort Detrick
Recreation
- Outdoor Access
- Yes
- Major Recreation Areas
- Catoctin Mountain Park · Gambrill State Park · Cunningham Falls State Park · Monocacy National Battlefield
- Parks & Trails
- Carroll Creek Linear Park · Baker Park · Ballenger Creek Park
History
- Founded
- 1748
- Named After
- Likely either Frederick, Prince of Wales, or Frederick Calvert, 6th Baron Baltimore
- Historical Significance
- Crossroads of American history, with a rich heritage dating back to colonial times
- Key Events
- County formed from parts of Prince George's and Baltimore Counties · Divided into three parts in 1776, forming Washington and Montgomery Counties · Civil War battles and significance