Johnson City, OR has a population of 547 and is the 19,013th largest city in the United States. The population density is 7,851 per sq mi which is 19726% higher than the Oregon average and 8566% higher than the national average. The median age in Johnson City is 54 which is approximately 38% higher than the Oregon average of 39. In Johnson City, 45% of the population over 15 years of age are married, 81% speak English and 16% speak Spanish. 50% of Johnson City residents were born in Oregon, 36% were born out of state, 1% were born outside of the United States and 12% were foreign born.