ZIP Code 97864
About Monument
Monument is a city in Grant County, Oregon, United States. The population was 115 at the 2020 census. 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.
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Area Profile
US Census (ACS 5-year · Gazetteer)
303
population
$37,336
median household income
1
people / sq mi
$507,800
median home value
$588
median gross rent
68.1
median age
272
housing units
216
households
265.0
land area (sq mi)