Brown and Seelye serves the following counties in Western Washington State:

• Clallam County
• Clark County
• Cowlitz County
• Grays Harbor County
• Island County
• Jefferson County
• King County
• Kitsap County
• Lewis County
• Mason County
• Pacific County
• Pierce County
• San Juan County
• Skagit County
• Skamania County
• Snohomish County
• Thurston County
• Wahkiakum County
• Whatcom County