|Country||United States of America|
|Elevation||93 m (305 ft)|
|Time zone||Eastern (EST) (UTC-5)|
|• Summer (DST)||EDT (UTC-4)|
|Area code(s)||410, 443, & 667|
|GNIS feature ID||590745|
Marriottsville is an unincorporated community in both Howard County and Carroll County, Maryland, United States. Marriottsville is located along Marriottsville Road near the Carroll County line, 10.3 miles (16.6 km) north-northwest of Columbia.
Marriottsville is named after General Richard Marriott's estate. Marriott was an heir of John Marriott of Severn who settled in Anne Arundel County in 1664. The land was originally part of a large section of land patented by Charles Carroll of Carrollton. Waverley slave plantation occupied a significant portion of the land which was known as the Howard District of Anne Arundel County. The village was home to a magnesium limestone quarry, and was known for farms such as "Prospect Hill", and School Board member Henry O. Devries (1826-1902) farm.
From 1965 to 1974, large tracts of Marriottsville once known as Alpha were purchased by land speculators anticipating development. In 1977 County Executive Edward L. Cochran chooses Marriottsville for a landfill site. Alpha Ridge Landfill opened in May 1980. A expansion plan proposed by Charles I. Ecker was suspended after contamination of groundwater was reported, which brought public water extensions, followed by density increases approved by the Howard County Department of Planning and Zoning for land development.
- James Eager Howard (1752-1827) a Colonel in the Revolutionary War, U.S. Senator, namesake of Howard County, Maryland and the fifth Governor of Maryland owned the slave plantation "Waverly" which still stands in present day Marriottsville.
- George Howard (1789-1846) the twenty-second Governor of Maryland and son of James Eager Howard also lived at "Waverly" after receiving it from his father in 1811.
- Frank J. Christensen, American Labor Leader
|Wikimedia Commons has media related to Marriottsville, Maryland.|
- "Marriottsville". Geographic Names Information System. United States Geological Survey.
- Maryland General Highway Statewide Grid Map: Marriottsville Map No. C-11D (PDF) (Map). Maryland Department of Transportation. 2011. Retrieved June 2, 2012.
- Seeking Freedom The History of the Underground Railroad in Howard County. p. 79.
- Josua Dorsey Warfeild. Founders of Anne Arundel and Howard Counties. p. 488.
- James D. Dilta. The Great Road: The Building of the Baltimore and Ohio. p. 213.
- Barbara Feaga. Howard's Roads to the Past. p. 56.
- "Landfill Toxins seep into bedrock". The Baltimores Sun. 21 Feb 1993.
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