Montpelier, LA has a population of 302 and is the 22,472nd largest city in the United States. The population density is 162 per sq mi which is 82% higher than the Louisiana average and 79% higher than the national average. The median age in Montpelier is 38 which is approximately 4% higher than the Louisiana average of 36. In Montpelier, 66% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 92% of Montpelier residents were born in Louisiana, 8% were born out of state, 0% were born outside of the United States and 0% were foreign born.