The Franklin County G. A. R. Soldiers’ Memorial Hall, also known as J.W. McKenzie Post No. 81, Grand Army of the Republic (GAR), is an historic building located at 3 Federal Street, North, in Hampton, Iowa, in the United States. The octagonal-style Grand Army of the Republic Memorial Hall was designed and built in 1890 by Edward Carl Keifer and was the meeting place of the J.W. McKenzie Post No. 81, which was one of 519 GAR posts in Iowa.