Packaging Corporation of America (PKG) 10-K 2006 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
·		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
·	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