The Old Post Office (NRHP-listed as Watertown Post Office) is a historic building located at 26 South Broadway in Watertown, South Dakota.
The Watertown Post Office was built in 1908 and served until 1976[citation needed]. From 1976 to 2009, it was known as Old Post Office Square, and housed several tenants. From 2009 to 2014 it was home to KXLG in Watertown.[2] It is currently the law office of Nancy Turbak Berry.[3]