Grants Pass, OR has a population of 36,776 and is the 1,141st largest city in the United States. The population density is 3,192 per sq mi which is 7962% higher than the Oregon average and 3424% higher than the national average. The median age in Grants Pass is 39 which is approximately equal to the Oregon average of 39. In Grants Pass, 55% of the population over 15 years of age are married, 94% speak English and 5% speak Spanish. 40% of Grants Pass residents were born in Oregon, 55% were born out of state, 1% were born outside of the United States and 4% were foreign born.