Kirwin is a city located in Kansas. With a 2020 population of 158, it is the 451st largest city in Kansas and the 17331st largest city in the United States. Kirwin is currently declining at a rate of 0.00% annually and its population has decreased by -7.60% since the most recent census, which recorded a population of 171 in 2010. Kirwin reached it's highest population of 171 in 2010. Spanning over 1 miles, Kirwin has a population density of 173 people per square mile.
The average household income in Kirwin is $44,903 with a poverty rate of 6.45%. The median rental costs in recent years comes to $656 per month, and the median house value is $37,500. The median age in Kirwin is 51.5 years, 53.7 years for males, and 31.5 years for females. For every 100 females there are 118.3 males.