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. Devon NewCo Corporation, a Delaware corporation; 6. Devon Canada Corporation, an Alberta corporation; 7. Devon Canada, a general partnership registered in Alberta; and 8. Devon AXL, a general partnership registered in Alberta.