1 EXHIBIT NO. 21 TUSCARORA INCORPORATED Subsidiaries ------------ The following subsidiaries are 100% owned by Tuscarora Incorporated: Jurisdiction of Incorporation Name of Subsidiary --------------- - ------------------ Pennsylvania Mat-Flo, Inc. Seneca Machine & Manufacturing Pennsylvania Co., Inc. Tuscarora Plastics of New New York York, Inc. Tuscarora Plastics of Ohio, Ohio Inc. Tuscarora International, Inc. Delaware Tuscarora Limited England The following companies are 100% owned subsidiaries of Tuscarora International, Inc. Tuscarora, S.A. de C.V. Mexico Tuscarora de Mexico, S.A. de C.V. Mexico