Dunkirk, IN has a population of 2,341 and is the 10,170th largest city in the United States. The population density is 1,863 per sq mi which is 938% higher than the Indiana average and 1956% higher than the national average. The median age in Dunkirk is 38 which is approximately 2% higher than the Indiana average of 37. In Dunkirk, 53% of the population over 15 years of age are married, 96% speak English and 2% speak Spanish. 84% of Dunkirk residents were born in Indiana, 16% were born out of state, 0% were born outside of the United States and 0% were foreign born.