**Table 1:** Comparison of total population and nativity percentages over time.
Year	Total Pop	Foreign Born	Native Born
2024	603,947	18.3%	81.7%
2023	600,266	17.7%	82.3%
2022	599,541	18.0%	82.0%
2021	596,969	17.9%	82.1%
2020	595,761	17.9%	82.1%
2019	589,481	17.7%	82.3%
2018	581,821	17.5%	82.5%
2017	572,071	17.1%	82.9%
2016	564,088	17.0%	83.0%
2015	556,210	16.9%	83.1%
2014	547,451	16.6%	83.4%
2013	539,608	16.7%	83.3%
2012	531,818	16.9%	83.1%
2011	524,275	16.8%	83.2%
2010	516,665	16.8%	83.2%

Nativity & Citizenship FAQs for Washington County, Oregon

Approximately 18.3% of residents in Washington County, Oregon were born outside the United States.

The vast majority of residents, roughly 90.8%, are U.S. citizens (including both native-born and naturalized citizens).

Washington County, Oregon Nativity & Citizenship Status (2024)