Koshkonong, MO has a population of 226 and is the 23,911th largest city in the United States. The population density is 1,293 per sq mi which is 1396% higher than the Missouri average and 1327% higher than the national average. The median age in Koshkonong is 40 which is approximately 3% higher than the Missouri average of 38. In Koshkonong, 49% of the population over 15 years of age are married, 98% speak English and 0% speak Spanish. 50% of Koshkonong residents were born in Missouri, 48% were born out of state, 1% were born outside of the United States and 1% were foreign born.