1 EXHIBIT 21 ROCK-TENN COMPANY SUBSIDIARIES OF ROCK-TENN COMPANY Name Jurisdiction of Incorporation ---- ----------------------------- 1. Rock-Tenn Company, Mill Division, Inc. Tennessee 2. Dominion Paperboard Products, Ltd. Quebec, Canada 3. Rock-Tenn Company of Texas Georgia 4. Rock-Tenn Converting Company Georgia 5. Rock-Tenn Company of Arkansas Georgia 6. Ling Industries, Inc. Quebec, Canada 7. Rock-Tenn Company of California, Inc. Delaware 8. Rock-Tenn Company of Illinois, Inc. Illinois 9. Concord Industries, Inc. Illinois 10. Waldorf Corporation Delaware 11. Wabash Corporation Delaware 12. Wabash Development, Inc. Delaware 13. Waldorf Realty Delaware 14. Best Recycling, Inc. Iowa 15. RTS Packaging, LLC Delaware 16. Rock-Tenn Recycling Company Quebec, Canada 17. 9028-9463 Quebec, Inc. Quebec, Canada 18. Rock-Tenn Partition Company Georgia 19. RTS Empaques S. de R.L. de C.V. Mexico