1 EXHIBIT 21.1 DEVON ENERGY CORPORATION Significant Subsidiaries 1. Devon Energy Corporation (Oklahoma), an Oklahoma corporation; 2. Devon Energy Production Company, L.P., an Oklahoma limited partnership; 3. Devon SFS Operating, Inc., a Delaware corporation; 4. Northstar Energy Corporation, an Alberta corporation; 5. Northstar Energy Partnership, an Alberta general partnership; and 6. Devon NewCo Corporation, a Delaware corporation.