Maine County Growth Overview
Maine's counties show varied growth patterns from 2020 to 2025. Franklin County leads with 6.2% annualized growth, followed by Piscataquis County (5.02%) and Oxford County (5.01%). The largest counties are Cumberland County (313,016), York County (221,858), and Penobscot County (156,480). Of the 16 counties in Maine, 15 are growing while just 1 has experienced population decline. Overall, counties averaged 3.2% annualized growth, with total population growing by 3.22% annually.