Uniondale, IN has a population of 309 and is the 22,339th largest city in the United States. The population density is 1,472 per sq mi which is 720% higher than the Indiana average and 1525% higher than the national average. The median age in Uniondale is 34 which is approximately 9% lower than the Indiana average of 37. In Uniondale, 68% of the population over 15 years of age are married, 94% speak English and 6% speak Spanish. 79% of Uniondale residents were born in Indiana, 18% were born out of state, 0% were born outside of the United States and 3% were foreign born.