Clatsop County Post Offices

750 Commercial St
Astoria, Oregon 97103

163 N Hemlock
Cannon Beach, Oregon 97110

906 Pacific Dr
Hammond, Oregon 97121

300 Avenue A
Seaside, Oregon 97138

99 N Main Ave
Warrenton, Oregon 97146

Clatsop County

There are 5 US Post Offices in Clatsop County serving a total of 35,452 residents equating to 7,090 residents per post office. It's estimated that approximately 56,585 packages are handled across the 5 county post offices annually. Clatsop County /\u02c8kl\u00e6ts\u0259p/ is a county located in the U.S. state of Oregon. As of the 2010 census, the population was 37,039. The county seat is Astoria. The county is named for the Clatsop tribe of Native Americans, who lived along the coast of the Pacific Ocean prior to European settlement. Clatsop County comprises the Astoria, OR Micropolitan Statistical Area."