population in upper marlboro md
Upper Marlboro is located in Prince Georges County in Maryland. 1  Population: 672. 2  Area: 0.43 sq. miles Land Area: 0.40 sq. miles. 3  Population Density: 1,566.43 people per sq. mile.  Elevation: 42.65 1  ft. Time Zone: Eastern Standard Time (GMT 2  -5) Daylight Savings:  Yes.