Courthouse Square Historic District (Greencastle, Indiana)

Courthouse Square Historic District, also known as Courthouse Square District, is a national historic district in Greencastle, Indiana, United States. In 1984, the historic district was added to the National Register of Historic Places.

The district includes seventy-six different contributing properties. Since the first years after Greencastle was platted in the early nineteenth century, the land included in the district has been the center of commerce and government for the area.

At its center is the Putnam County Courthouse: the current courthouse, built in 1905, is the fourth building to occupy the site. Other historic buildings include the Old National Bank building at 1 N Indiana Street.