Johnstown, NE has a population of 83 and is the 27,334th largest city in the United States. The population density is 156 per sq mi which is 550% higher than the Nebraska average and 72% higher than the national average. The median age in Johnstown is 51 which is approximately 42% higher than the Nebraska average of 36. In Johnstown, 82% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 72% of Johnstown residents were born in Nebraska, 28% were born out of state, 0% were born outside of the United States and 0% were foreign born.