Loudon Park National Cemetery is a United States National Cemetery located in the city of Baltimore, Maryland.

Administered by the United States Department of Veterans Affairs, it encompasses 5.2 acres (2.1 ha), and as of the end of 2005, had 7,138 interments.

It is currently closed to new interments, and is maintained by the Baltimore National Cemetery.

During the American Civil War, Fort McHenry was a prisoner of war camp, and the prisoners who died while incarcerated there were interred at Loudon Park National Cemetery.

[3] Land acquisitions in 1874, 1875, 1882, 1883 and lastly in 1903, brought the cemetery to its current size.