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