Barnes, KS has a population of 129 and is the 26,190th largest city in the United States. The population density is 758 per sq mi which is 2062% higher than the Kansas average and 737% higher than the national average. The median age in Barnes is 50 which is approximately 39% higher than the Kansas average of 36. In Barnes, 87% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 67% of Barnes residents were born in Kansas, 33% were born out of state, 0% were born outside of the United States and 0% were foreign born.