Caribou, ME has a population of 7,902 and is the 4,740th largest city in the United States. The population density is 100 per sq mi which is 165% higher than the Maine average and 10% higher than the national average. The median age in Caribou is 45 which is approximately 2% higher than the Maine average of 44. In Caribou, 60% of the population over 15 years of age are married, 91% speak English and 0% speak Spanish. 75% of Caribou residents were born in Maine, 19% were born out of state, 1% were born outside of the United States and 5% were foreign born.