EXHIBIT 21

DEVON ENERGY CORPORATION

Significant Subsidiaries

1. Devon Energy Corporation (Oklahoma), an Oklahoma corporation

2. Devon Financing Corporation, L.L.C., a Delaware limited liability company

3. Devon OEI Holdings, L.L.C., a Delaware limited liability company

4. Devon OEI Operating, L.L.C., a Delaware limited liability company

5. Devon Energy Production Company, L.P., an Oklahoma limited partnership

6. Devon Energy International, Ltd., a Delaware corporation

7. Devon Operating Company Ltd., an Alberta corporation

8. Devon Canada Holdings LP, an Alberta limited partnership

9. Devon Canada Corporation, a Nova Scotia corporation

10. Devon AXL, a general partnership registered in Alberta

11. Devon NEC Corporation, a Nova Scotia corporation

12. Devon Canada, a general partnership registered in Alberta