According to the US Census Bureau population estimates, there were 1,340,123 people living in Maine in 2018. Cumberland County was the most populated county with 294,363 residents, followed by York County with 206,041 residents, and Penobscot County with 151,798 residents. Piscataquis County with a population of 16,714 was the least populated county in Maine in 2018.

Use the map below to interactively explore the population of each county in Maine in 2018. The data can also be explored further by sorting and filtering with the table below.