Arlington National Cemetery occupied 200 acres when it was established in 1864.
The cemetery began on part of the Arlington estate during the Civil War. The original 200-acre burial ground was selected because Washington-area military hospitals needed additional space for wartime dead. The grounds later expanded dramatically beyond that initial footprint.
Today, Arlington covers more than 600 acres and contains hundreds of thousands of graves. Its growth reflects the cemetery’s continuing role as a national burial ground for service members, veterans, and some public figures.
The original acreage is easy to confuse with the cemetery’s modern size. Arlington’s land was expanded through later purchases and transfers, while the surrounding Arlington House grounds also have their own historical boundaries. Memorial Day ceremonies now take place within the much larger cemetery complex created after the Civil War.