Exhibit 21.1

Subsidiaries of the Registrant *

	State or Other Jurisdiction of Incorporation or Organization
Packaging Corporation of America (100%)	Delaware
PCA Corrugated and Display, LLC (100%)	Delaware
Polywoven Distributors PA, LLC (51%)	Pennsylvania
PCA International Inc. (100%)	Delaware
PCA International Services, LLC (100%)	Delaware
PCA Hydro Inc. (100%)	Delaware
Packaging Corporation of Asia, Limited (100%)	Hong Kong
PCA Texas Acquisition, LLC (100%)	Delaware
PCA Central California Corrugated, LLC (100%)	Delaware
Hexacomb Corporation (100%)	Illinois
Hexacomb Canada Holdings Corporation (100%)	Canada
Hexacomb Canada Corporation (100%)	Canada
Louisiana Timber Procurement Company, LLC (50%)	Delaware
Boise White Paper, LLC (100%)	Delaware
International Falls Power Company (100%)	Delaware
Minnesota, Dakota & Western Railway Company (100%)	Minnesota
B C T, Incorporated (100%)	Delaware

* The names of some of our foreign subsidiaries have been omitted. These unnamed subsidiaries, considered in the aggregate as a single subsidiary, would not constitute a significant subsidiary, as defined in Regular S-X, Rule 1-02 (w).