Exhibit 21

DEVON ENERGY CORPORATION

List of Subsidiaries¹ as of December 31, 2020

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

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

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

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

5. Devon Financing Company, L.L.C., a Delaware limited liability company

6. Devon Canada Corporation, an Alberta corporation

7. Devon Gas Services, L.P., a Texas limited partnership

8. Devon Gas Co., L.L.C., a Delaware limited liability company

9. Devon Energy International, L.L.C., a Delaware limited liability company

10. Devon Headquarters, L.L.C., an Oklahoma limited liability company

11. Bleu Falcon Holdings, Inc., a Delaware corporation

¹  The names of certain subsidiaries have been omitted since, considered in the aggregate as a single subsidiary, they would not constitute a significant subsidiary as of the end of the year covered by this report, as defined under Securities and Exchange Commission Regulation S-X, Rule 1-02(w).