24/7 Trauma and Biohazard Cleanup in Dundalk, MD

Dundalk is an unincorporated census-designated place in Baltimore County, Maryland, on the Patapsco River just southeast of Baltimore, and its addresses use ZIP code 21222.

The 2020 census counted 67,796 people in Dundalk, up from 63,597 in 2010, in 25,313 households and 27,319 housing units.

In 1960 and 1970 Dundalk was the largest unincorporated community in Maryland, and its population peaked at 85,377 in 1970; it is considered one of Baltimore's first inner-ring suburbs.

Irish immigrant Henry McShane founded the McShane Bell Foundry on the Patapsco River in 1856, and when the railroad asked him for a depot name he chose 'Dundalk' after his birthplace, Dundalk in County Louth, Ireland.

In 1916 Bethlehem Steel bought 1,000 acres of farmland to house workers of its Sparrows Point shipyard, and the Dundalk Company laid out the town in the style of Roland Park, reserving land for schools, playing fields, and parks.

By 1917 the new town had 62 houses, two stores, a post office, and a telephone exchange, and its maritime street names still include Shipway, Northship, Flagship, and Admiral.

During World War I, Black workers were pushed out of Dundalk into the neighboring community of Turner Station, which grew further during World War II and was home to Henrietta Lacks, the woman whose cells became the famous HeLa cell line.

Dundalk was once nicknamed a 'Little Appalachia' for the many Appalachian migrants who came to work in its steel mills and shipyards, and the Dundalk Historic District was listed on the National Register of Historic Places in 1983.

The Community College of Baltimore County's Dundalk campus, formerly Dundalk Community College, serves the area, along with Dundalk High School, Patapsco High School, and Sparrows Point High School.

Sollers Point Technical High School in Dundalk is one of the few high schools in the United States to hold ISO 9001 certification.