Maine Business by the Numbers: 2026 Company Breakdown

Key findings

• Maine ranks 46th nationally with 199,803 companies — 0.3% of all 64,799,929 U.S. companies in the directory.
• Portland is the state’s largest business hub, with 22,123 companies — 11.1% of every company in Maine.
• Business is concentrated in a few metros: Portland, Lewiston and Auburn together hold 15.3% of the state’s companies.
• Industrial & mechanical leads the state’s industries at 51,077 companies (25.6%), across 7 tracked sectors.

How Maine ranks nationally

Maine and its closest neighbours by total company count. Select a state to open its own study.

Top Maine cities by number of companies

These 4 cities account for 16.5% of all companies in Maine. Select any city to browse its full company list.

Browse all Maine companies →

Maine companies by industry

Every company is classified by its primary industry using NAICS/SIC codes. Select a sector to see those Maine companies.

What the numbers show

Maine’s 199,803 companies place it 46th nationally, 0.3% of the U.S. total. Activity clusters in its largest metros — Portland, Lewiston and Auburn alone account for 15.3% of the state’s companies — while industrial & mechanical is the dominant sector at 25.6%. For buyers and sellers, that means the deepest pools of suppliers and manufacturers sit in a handful of cities and one or two sectors; the charts above link straight into each so you can shortlist by capability and region.

Methodology

Figures reflect companies listed in Factur’s U.S. business directory as of 2026, classified by headquarters city and primary industry using NAICS/SIC codes. “Companies” includes manufacturers, suppliers, and B2B businesses of all sizes; counts are directory totals, not official census figures, and percentages are computed against the Maine directory total. Data compiled by Factur, a sales and marketing firm for B2B manufacturers.