Knowlton Mansion, also known as the Rhawn Residence, is a historic mansion that is located in the Fox Chase neighborhood of Philadelphia, Pennsylvania, United States.

The three-story mansion was designed in the Gothic Revival style by renowned nineteenth-century architect Frank Furness as a residence for William Rhawn, a successful Philadelphia banker. It was completed in 1881 and named after John Knowles, the great-grandfather of Rhawn's wife. It later served as the residence for Robert MacKay Green II, who was the son of Robert MacKay Green I, who invented ice cream soda in 1874.

The 13-acre property included a carriage house, gatekeeper’s house and barn. The architect incorporated fieldstone quarried at the site, and adorned the Queen Anne-inspired home with arched gables, bracketed balconies and carved chimneys.

A renovation in the mid-1990s preserved much of the interior beauty, including stained-glass windows, elaborate woodwork, inlaid floors, and carved fireplaces with Minton tiles.

The mansion was listed on the National Register of Historic Places in 1974.

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