Hillsdale is a populated place LOCATED WITHIN the Birch Bay CDP. In turn, the Birch Bay CDP is located within Whatcom County.
Hillsdale is located at latitude 48.96 and longitude -122.736.
Since Hillsdale is located within the Birch Bay CDP, all of the census and demographic data for residents of Hillsdale are included as part of the information reported for Birch Bay CDP in the "Profile" tab above.
(Note: CDP = Census Designated Place. A CDP is a statistical area delineated locally specifically for the tabulation of Census Bureau data. While CDPs have specified boundaries, these boundaries have no legal significance.)
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BOUNDARY MAPS: Birch Bay CDP | Blaine Division | Whatcom County