Named after Louis Dumas, president of the company that founded this seat of Moore County in 1892. Oil was discovered here in 1926. Dumas is in the heart of the nation's largest grain sorghum producing area, and the center of one of the world's largest natural gas fields. Recreation areas include eight city parks. Scenic beauty is found in the rugged canyons and hills of Canadian River breaks. Nearby Lake Meredith offers fishing, boating, swimming and water skiing.

Texoma (municipal) RV Park is on U.S. 87 W within city limits. Bed-and-breakfast accommodations nearby. Events include annual Dogie Days in June and the World Championship Mud Volleyball Tournament in July.