Burr Oak, KS has a population of 161 and is the 25,381st largest city in the United States. The population density is 196 per sq mi which is 457% higher than the Kansas average and 116% higher than the national average. The median age in Burr Oak is 57 which is approximately 58% higher than the Kansas average of 36. In Burr Oak, 63% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 29% of Burr Oak residents were born in Kansas, 65% were born out of state, 0% were born outside of the United States and 6% were foreign born.