Montgomery County, Maryland

Montgomery County of the U.S. state of Maryland is north of Washington, D.C. and southwest of Baltimore. It is one of the richest counties in the United States,^[5] and has one of the highest percentages (32.8%) of residents over 25 years old who hold a post-graduate degree.^[6] The county seat and largest municipality is Rockville.^[7]

Montgomery County, Maryland
County
Clockwise: Downtown Bethesda, Spring Street in Silver Spring, Billy Goat B Trail, rural Darnestown, Rockville town center, Great Falls on the Potomac River.
Flag Seal Coat of arms
Nickname:  "MoCo"
Motto:  French: Gardez Bien (English: Watch Well)
Location in the U.S. state of Maryland
Coordinates: 39°08′11″N 77°12′15″W[1]
Country	United States
State	Maryland
Seat	Rockville
Largest community	Germantown
Founded	September 6, 1776[2][3]
Named for	Richard Montgomery
Government
• Executive	Marc Elrich (D)
Area
• Total	506.91 sq mi (1,312.89 km2)
• Land	493.11 sq mi (1,277.15 km2)
• Water	13.80 sq mi (35.74 km2)
Population  (2020)
• Total	1,062,061
• Density	2,153.80/sq mi (831.59/km2)
Demonyms	Montgomery Countyan, MoCoite
Gross Domestic Product [4]
• Total	US$93.746 billion (2022)
Time zone	UTC−05:00 (Eastern [EST])
• Summer (DST)	UTC−04:00 (EDT)
ZIP Codes	20812–20918
Area codes	301 240
Congressional districts	4th, 6th, 8th
Website	www.montgomerycountymd.gov