Wilson Bridge, also known as Old Royster Ford and Carroll County Bridge No. 121, is a historic Pratt through truss bridge that spans Deer Creek and is located in Deer Creek Township, Carroll County, Indiana. It was built by the Lafayette Bridge Company in 1897-1898. It measures 122 feet long and 14 feet high.It was listed on the National Register of Historic Places in 2001. It is located in the Deer Creek Valley Rural Historic District.