Logan, MT has a population of 45 and is the 28,281st largest city in the United States. The population density is 90 per sq mi which is 1215% higher than the Montana average and 1% lower than the national average. The median age in Logan is 57 which is approximately 44% higher than the Montana average of 40. In Logan, 82% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 60% of Logan residents were born in Montana, 40% were born out of state, 0% were born outside of the United States and 0% were foreign born.