Grass Valley, OR has a population of 149 and is the 25,685th largest city in the United States. The population density is 293 per sq mi which is 639% higher than the Oregon average and 223% higher than the national average. The median age in Grass Valley is 46 which is approximately 18% higher than the Oregon average of 39. In Grass Valley, 59% of the population over 15 years of age are married, 96% speak English and 4% speak Spanish. 58% of Grass Valley residents were born in Oregon, 36% were born out of state, 5% were born outside of the United States and 2% were foreign born.
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The population density in Grass Valley is 639% higher than Oregon.
The median age in Grass Valley is 18% higher than Oregon.
In Grass Valley 93.96% of the population is White.
In Grass Valley 1.34% of the population is Black or African American.