Packaging Corporation of America (NYSE: PKG), will hold a conference call on Tuesday, April 19, 2011 at 10:00 a.m. (Eastern Time) to discuss first quarter 2011 results. First quarter 2011 earnings will be released after the market closes on April 18, 2011.

For access to the conference call on April 19th, please dial (866) 219-5268 (U.S. and Canada) and (703) 639-1120 (International) by 9:45 a.m. (Eastern Time). The conference call leader will be Mark Kowlzan.

A replay of the call will also be available from 2:00 p.m. (Eastern Time) on April 19, 2011 until 11:59 p.m. (Eastern Time) on May 11, 2011. To access the recording, please dial (888) 266-2081 (U.S. and Canada) and (703) 925-2533 (International). The passcode is 1523611.

This call will also be webcast and can be accessed at PCA’s website at: www.packagingcorp.com.

PCA is the fifth largest producer of containerboard and corrugated packaging products in the United States with sales of $2.44 billion in 2010. PCA operates four paper mills and 67 corrugated product plants in 26 states across the country.

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