Howard County, Maryland

Howard County, Maryland
Clockwise: Main Street in Ellicott City, Merriweather Post Pavilion in Columbia, McKeldin Rapids in Patapsco Valley State Park, Howard County Conservatory, Savage Mill, Town Center in Columbia.
Nickname: 
"HoCo"
Location within the U.S. state of Maryland
Coordinates: 39°15′N 76°56′W / 39.25°N 76.93°W / 39.25; -76.93
Country United States
State Maryland
FoundedMay 13, 1838
Named afterJohn Eager Howard
SeatEllicott City
Largest communityColumbia
Area
 • Total
253 sq mi (660 km2)
 • Land251 sq mi (650 km2)
 • Water2.7 sq mi (7.0 km2)  1.0%
Population
 (2020)
 • Total
332,317
 • Density1,320/sq mi (511/km2)
Time zoneUTC−5 (Eastern)
 • Summer (DST)UTC−4 (EDT)
Congressional districts3rd
Websitehowardcountymd.gov

Howard County is located in the U.S. state of Maryland. As of the 2020 census, the population is 334,529. Since there are no incorporated municipalities, there is no incorporated county seat either. Therefore, its county seat is the unincorporated community of Ellicott City. Howard County is part of the Baltimore metropolitan area.

The county is home to Columbia, a planned community between Baltimore and Washington, D.C. with a population of approximately 100,000, founded in 1967.

Howard County is frequently cited for its affluence, quality of life, and excellent schools. Its estimated 2020 median household income of $124,042 (~$147,702 in 2024) makes it one of the wealthiest counties in the US. Many of the most affluent communities in the area, such as Clarksville, Dayton, Glenelg, Glenwood, and West Friendship, are located along the Route 32 corridor in Howard County. The main population center of Columbia/Ellicott City is regularly ranked in Money magazine's Top 10 "Best Places to Live". According to data from the U.S. Census Bureau, Howard County ranks fourth in the nation for educational attainment, with an estimated 63.6% of residents 25 and over holding a bachelor's degree or higher. In 2022, the Howard County Public School System was ranked the best school district in Maryland.

In 2010, the center of population of Maryland was located in the Howard County town of Jessup.