The sun parlor, containing three sets of French doors, is the farthest room to the east and is a cheerful addition to the otherwise formal home. The floors, decorated with 4" marble tiles, is original to the home. The room is furnished with Heywood Wakefield bamboo and rattan furniture.

During the time the Marlands occupied the home, one could stand in this room and look out the windows to the east where they could see four city blocks of formal gardens designed by Henry Hatashita, Marland's Japanese gardener. The original gardens covered 80 acres. Mr. Hatashita introduced many new varieties of plants and trees to the area and when E.W. Marland became the 10th governor of Oklahoma, Mr. Hatashita was invited to landscape the governor's mansion in Oklahoma City.

The room features decorative iron grillwork covering the radiators and they complement the wrought iron detail of the original light fixture. Looking east through the windows, a large veranda, which acts as a roof for the indoor swimming pool, meets the eye and is still used for a variety of parties and other events.