Below are a list of the cities located in Washington County, OR. There are 31 total unique zip codes in Washington County, Oregon. The time zone for Washington County is the Pacific Daylight Time zone and they follow daylight savings time. The Federal Information Processing System (FIPS) Code for echo $county.' County, '.$state_abbrev ?> is 41067.
The population in Washington County, OR is currently 600,811. That is an increase of 13.42% vs the population of 529,710 in 2010.
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