Cedar Grove, IN has a population of 257 and is the 23,280th largest city in the United States. The population density is 1,714 per sq mi which is 855% higher than the Indiana average and 1792% higher than the national average. The median age in Cedar Grove is 47 which is approximately 25% higher than the Indiana average of 37. In Cedar Grove, 58% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 46% of Cedar Grove residents were born in Indiana, 54% were born out of state, 0% were born outside of the United States and 0% were foreign born.