Brewster, KS has a population of 294 and is the 22,609th largest city in the United States. The population density is 1,138 per sq mi which is 3143% higher than the Kansas average and 1156% higher than the national average. The median age in Brewster is 50 which is approximately 39% higher than the Kansas average of 36. In Brewster, 73% of the population over 15 years of age are married, 88% speak English and 10% speak Spanish. 47% of Brewster residents were born in Kansas, 48% were born out of state, 0% were born outside of the United States and 6% were foreign born.