Elkridge is a census-designated place 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 various small communities between it and Columbia. Elkridge apartments for rent comparison page shows most up to date rent information on Elkridge apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.