Dundalk is an unincorporated community and a census-designated place in Baltimore County, Maryland, United States. The population was 62,306 at the 2000 census. In 1960 and 1970, Dundalk was the largest unincorporated community in Maryland. Dundalk apartments for rent comparison page shows most up to date rent information on Dundalk apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.