Monroe, OR

View of Monroe, OR
Image credit: QuintinK / CC BY-SA 4.0
Population
665
U.S. Census Population Estimates Program · 2025
Elevation
288 ft
Median Home Value
$348,700
U.S. Census American Community Survey 5-Year · 2024
Median Rent
$1,359/mo
U.S. Census American Community Survey 5-Year · 2024
Median Income
$78,646
U.S. Census American Community Survey 5-Year · 2024

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Monroe in context.

About Monroe

Monroe is a Benton County city in the mid-Willamette Valley, midway between Corvallis and Eugene along Highway 99W. Its first local center grew around Joseph White's 1852 sawmill on the Long Tom River, then called White's Mill. The Applegate Trail also crossed the river here, giving Monroe an early travel connection that still echoes in the highway corridor. The city sits in a farm-and-woodland stretch of the valley, with the Long Tom and surrounding roads doing as much to define the place as the limits on a map.

Today Monroe's downtown, city services, school, and local businesses sit alongside the 99W route, while Corvallis and Eugene handle larger regional trips. The old mill story is still part of the city's identity, and the Long Tom remains the natural thread through the center. Monroe's local scoop is a small Willamette Valley city with two layers of movement: a river crossing and sawmill settlement underneath a modern highway between two college towns. The result is a place that reads as a valley crossroads even at its compact scale.

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