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Clackamas County, Oregon
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Clackamas County // is a county in the U.S. state of Oregon. As of the 2010 United States Census, the population was 375,992. It is Oregon's third-most populous county. Its county seat is Oregon City.
- "State & County QuickFacts". US Census Bureau. http://quickfacts.census.gov/qfd/states/41/41005.html. Retrieved November 14, 2013.
- "Find a County". National Association of Counties. Archived from the original on 31 May 2011. https://web.archive.org/web/20110531210815/http://www.naco.org/Counties/Pages/FindACounty.aspx. Retrieved June 7, 2011.