Packaging Corporation of America (PKG) 10-K 2004 FY Annual report

Exhibit 21.1

Subsidiaries of the Registrant

•	Dixie Container Corporation
		State of Incorporation:	Virginia
		Other trade names used:	Packaging Corporation of Ohio
•	PCA Hydro, Inc.
		State of Incorporation:	Delaware
		Other trade names used:	none
•	Packaging Corporation of Illinois
		State of Incorporation:	Delaware
		Other trade names used:	Acorn Corrugated Box Company
•	Tomahawk Power LLC
		State of Incorporation:	Delaware
		Other trade names used:	none
•	PCA International, Inc.
		State of Incorporation:	Delaware
		Other trade names used:	none
	• PCA International Services, LLC
		State of Incorporation:	Delaware
		Other trade names used:	none
	• PCAI de Mexico S. de R.L. de C.V.
		State of Incorporation:	Sonora, Mexico
		Other trade names used:	none
	• PCAI Services de Mexico S. de R. L.de C.V.
		State of Incorporation:	Sonora, Mexico
		Other trade names used:	none
•	Packaging Credit Company, LLC
		State of Incorporation:	Delaware
		Other trade names used:	none
	• Packaging Receivables Company, LLC
		State of Incorporation:	Delaware
		Other trade names used:	none