Monument is a city in Grant County, Oregon, United States.

It is located near the confluence of the North and Middle Forks of the John Day River.

Its post office was established in 1874 and named for a nearby mountain or rock formation.

The program taught students about the ecology of local Ponderosa Pine forest and sagebrush steppe and the water quality and habitat of streams.

With a population of 165 in 2000, Monument had "a grocery store, restaurant, tavern, three churches, a senior center, fire station and the offices of the Columbia Power Electric Cooperative utility.

"[6] According to the United States Census Bureau, the city has a total area of 0.51 square miles (1.32 km2), all land.

[6][8] This region experiences warm (but not hot) and dry summers, with no average monthly temperatures above 71.6 °F (22.0 °C).

The racial makeup of the city was 95.36% White, 3.97% Native American, and 0.66% from two or more races.