Mill Grove is the first home in America of John James Audubon and the only true Audubon home still standing in the United States. Located in Lower Providence Township, Montgomery County, Pennsylvania, Mill Grove was owned for over 17 years by Audubon's father, Jean, a French sea captain. His son John James Audubon lived on the estate from 1803 to 1806. Father and son divested themselves of Mill Grove by 1808. In 1813 Samuel Wetherill of Philadelphia purchased the property. Aside from a break between 1876 -1892, Mill Grove remained in the Wetherill family until Herbert J. Wetherill sold it in 1951 to Montgomery County. The County established the site as a nature sanctuary and a museum about John James Audubon. In 2003 Montgomery County and the National Audubon Society entered into a public/private partnership for Mill Grove. Now named "The John James Audubon Center at Mill Grove," this Montgomery County owned historic site is under the daily management/operation of the National Audubon Society.

The archival collections at the John James Audubon Center at Mill Grove include materials relating to John James Audubon and his family, the Wetherill family, Mill Grove site history, the National Audubon Society, and bird watching. The holdings total approximately 26 linear feet of materials dating from 1726 to 2002.