|— Census-designated place —|
|Country||United States of America|
|• Total||7.9 sq mi (20.4 km2)|
|• Land||7.9 sq mi (20.4 km2)|
|• Water||0.0 sq mi (0.0 km2)|
|Elevation||92 ft (28 m)|
|• Density||2,799.9/sq mi (1,081.1/km2)|
|Time zone||Eastern (EST) (UTC-5)|
|• Summer (DST)||EDT (UTC-4)|
|Area code(s)||410 443|
|GNIS feature ID||0590149|
Elkridge is a census-designated place (CDP) in Howard County, Maryland, United States. The population was 22,042 at the 2000 census. Founded early in the 18th century, Elkridge is located at the confluence of three counties, the other two being Anne Arundel and Baltimore counties. It is bordered on the north by Catonsville, on the east by Linthicum and Baltimore-Washington International Airport, on the south by Dorsey, and on the west by Ellicott City and various small communities between it and Columbia.
Elkridge qualifies as the oldest settlement in its present county, when Howard was a part of Anne Arundel County. Its location on the Patapsco River was a key element in its growth. The settlement existed even before the Maryland General Assembly elected a law to erect a 30-acre (120,000 m2), forty-lot town at Elkridge Landing to be called "Jansen Town" in 1733. Initially, the settlement was developed as a place where planters, who each had a wharf along the river, could bring their tobacco crop to be loaded on English trading ships. Later, Elkridge Landing was built as the seaport dock for the community. In 1825, Jansen Town burned, taking out all of the oldest buildings at the Landing and 9 out of 10 houses in the village. The Elkridge Furnace Complex is a historic iron works located on approximately 16 acres (65,000 m2) and including six remaining buildings of an iron furnace which operated from the 18th century into the 1860s.
Elkridge has historic churches, including Melville Church on Furnace Ave. Its original building was the first Methodist church built (1772) and was visited on the circuit rides of Francis Asbury. Saint Augustine Church, on Old Washington Blvd., was originally built in 1845.
Elkridge had a rich history of industries including pig-iron forging, basket weaving, paper, cotton and grist milling, as well as employment from the B&O Railroad. The Thomas Viaduct, located over Levering Avenue at the entrance to the Patapsco Valley State Park, is the oldest stone curved bridge in the world. Built in 1833, its architect was Benjamin Latrobe, Jr. The B&O first used horse-drawn coaches in relays, hence Relay Station was added. The viaduct also carried the Tom Thumb, and the first telegraph message from Washington, D.C., stating "What has God wrought?" was wired across.
Elkridge did not escape the Civil War. Union troops guarded the Thomas Viaduct and the thoroughfare to Baltimore City with a captured Winans Steam Gun while camping on Lawyers Hill, a community of summer estates built over the years by residents such as Caleb Dorsey ("Belmont"), Baltimore City Supreme Bench Judge George Washington Dobbin ("the Lawn"), Thomas Donaldson ("Edgewood"), John Latrobe ("Fairy-Knowe"), and the Penniman family home ("Wyndhurst"). Some of these families had slaves. Their estate cottages were built along the very top of the Lawyers Hill, including along Old Lawyers Hill Road, on which at one corner stands the Elkridge Assembly Rooms. This community hall, built in 1871, was a neutral meeting place for entertainments for Northern and Southern sympathizers of the neighborhood and owned by them as stockholders. Neighbors did not betray neighbors and each protected others' property from advancing troops. The Lawyers Hill Historic District was listed on the National Register of Historic Places in 1993.
Elkridge is located at .(39.202057, -76.750157)
Elkridge was named for a geographic ridge line, the area and length extending as far west as Doughoregan Manor and as far south as Oakland Mills. According to the United States Census Bureau, the CDP has a total area of 7.9 square miles (20 km2), all of it land, except for the Patapsco River and its small tributaries.
As of the census of 2000, there were 22,042 people, 8,324 households, and 5,793 families residing in the CDP. The population density was 2,799.9 people per square mile (1,081.4/km²). There were 8,719 housing units at an average density of 1,107.5 per square mile (427.8/km²). The racial makeup of the CDP was 80.58% White, 9.59% African American, 0.21% Native American, 6.47% Asian, 0.03% Pacific Islander, 0.95% from other races, and 2.16% from two or more races. Hispanic or Latino of any race were 2.22% of the population.
There were 8,324 households out of which 42.0% had children under the age of 18 living with them, 55.6% were married couples living together, 10.5% had a female householder with no husband present, and 30.4% were non-families. 22.5% of all households were made up of individuals and 4.1% had someone living alone who was 65 years of age or older. The average household size was 2.64 and the average family size was 3.16.
In the CDP the population was spread out with 29.2% under the age of 18, 6.0% from 18 to 24, 44.4% from 25 to 44, 15.3% from 45 to 64, and 5.2% who were 65 years of age or older. The median age was 32 years. For every 100 females there were 95.5 males. For every 100 females age 18 and over, there were 91.9 males.
The median income for a household in the CDP was $65,835, and the median income for a family was $71,923. Males had a median income of $47,329 versus $35,802 for females. The per capita income for the CDP was $27,629. About 2.0% of families and 2.7% of the population were below the poverty line, including 2.9% of those under age 18 and 5.5% of those age 65 or over.
Notable natives and residents 
- Leonard Marion Bahr, portrait painter
- Florence Riefle Bahr, artist and activist, Maryland's "Woman of the Year" in 1999
- Saint John Neumann, pastor of Saint Augustine Church 1849-1851
- Jonathan Ward, actor (Charles in Charge, Mac and Me)
- John Merson, baseball player
- Elkridge Heritage Society (1983). Lawyers Hill Heritage: Elkridge - 3 Wars and the Peace.
- "Sidelight on the Baltimore Riot," Maryland Historic Magazine Quarterly,. Mus. and Library of MHS. Winter 1994. p. 441.
- Cramm, Joetta M. (1987). A Pictorial History of Howard County. p. 441.
- "Maryland Historical Trust". Elkridge Furnace Complex, Howard County. Maryland Historical Trust. 2008-11-21.
- Joseph R. Mitchell, David Stebenne. New City Upon a Hill: A History of Columbia, Maryland. p. 22.
- "National Register Information System". National Register of Historic Places. National Park Service. 2008-04-15.
- "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.
See also