Hillsboro Flag

Hillsboro

County Seat:
Yes
Area (mi²):
26.443
State:
Oregon

Hillsboro is a city located in Washington County, Oregon. Hillsboro has a 2026 population of 110,337. It is also the county seat of Washington County. Hillsboro is currently growing at a rate of 1.18% annually and its population has increased by 3.04% since the most recent census, which recorded a population of 107,084 in 2020.

110.3K
Total Population
4,173
Density (mi²)
1.3K 1.18%
Growth

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)