How a post office error helped name a growing Oregon city

Countries & Cities · Published 15 October 2026 Swipe more like this →

In short: In 1884, a local merchant’s clever proposal to the US Post Office Department inadvertently changed the identity of a settlement. What began as a simple request for a post office helped transform a collection of pioneer claims into the vibrant, agricultural hub known today as Gresham.

The origins of Gresham are rooted in the mid-1 and 19th-century settlement of the Willamette Valley. In 1851, brothers Jackson and James Powell claimed land under the Donation Land Claim Act of 1850, establishing a settlement they called Powell's Valley. Before this era, the area was inhabited by the Kalapuya Native Americans, though much of their population was lost to disease by the 1830s.

The city's current name is the result of a 1884 administrative quirk. A local merchant petitioned for a post office at his store, suggesting it be named after Postmaster General Walter Q. Gresham. At the same time, another community established a 'Campground' post office, named for a local religious site. When the US Post Office Department realized its error, it revoked the 'Campground' designation, leaving the Gresham name to persist.

Since its formal incorporation in 1905, Gresham has evolved from an agricultural center—specializing in grapes, vegetables, and berries like raspberries—into a significant urban hub. The city's population experienced a notable surge between 1960 and 1970, growing from 4,000 to over 10,000 residents. By the 2020 census, the population reached 114,247, making it the fourth-most populous city in Oregon. Today, the city spans over 23 square miles, characterized by a Mediterranean climate and a landscape shaped by Johnson Creek.

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