Florence, MT has a population of 519 and is the 19,307th largest city in the United States. The population density is 676 per sq mi which is 9794% higher than the Montana average and 646% higher than the national average. The median age in Florence is 49 which is approximately 23% higher than the Montana average of 40. In Florence, 72% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 38% of Florence residents were born in Montana, 61% were born out of state, 0% were born outside of the United States and 1% were foreign born.