The Auburn Heights Preserve is a state park in Yorklyn, Delaware. It features the Auburn Heights, an 1897 Victorian county estate.

Originally owned by Irael and Elizabeth Marshall, the Auburn Heights Preserve was home to the Marshall Brothers Paper Mill opened in 1901. It produced vulcanized fiber products that were commonly used in making footlockers, suitcases, and other items of the sort. The site also became known for its association with T. Clarence Marshall, youngest son of Israel and Elizabeth, who became a noted steam car collector.

Today, visitors of the Auburn Heights Preserve can enjoy the stunning views around the site, as well as explore the mansion and antique car collections of the Marshall family through the Marshall Steam Museum.