Calvin, LA has a population of 239 and is the 23,644th largest city in the United States. The population density is 104 per sq mi which is 18% higher than the Louisiana average and 15% higher than the national average. The median age in Calvin is 33 which is approximately 8% lower than the Louisiana average of 36. In Calvin, 54% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 92% of Calvin residents were born in Louisiana, 8% were born out of state, 0% were born outside of the United States and 0% were foreign born.