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Profitability · Maine

US Banks with Highest Net Interest Margin (NIM) in Maine

Ranked among banks headquartered in Maine. Re-ranked 1-22 within the state from the same national ranking population.

#1 Net Interest Margin (NIM): NORTHEAST BANK — 5.08% . Net Interest Margin (NIM) measures the spread between interest earned on assets and interest paid on liabilities — the core unit economics of a commercial bank.

Ranked: 22 banks with reported data Showing: Top 22 Source: FFIEC call reports (Q1 2026) What is this metric? See the US Banks with … glossary entry Go deeper: What Is Net Interest Margin? A Bank Profitability Guide
# Bank HQ US Banks with … Total Assets
1 Northeast Bank Lewiston , ME 5.08% $5.03B
2 Franklin Savings Bank Farmington , ME 4.36% $764.6M
3 First Federal Savings and Loan Association of Bath Bath , ME 4.09% $186.8M
4 Katahdin Trust Company Patten , ME 3.89% $1.11B
5 Skowhegan Savings Bank Skowhegan , ME 3.76% $843.5M
6 Bar Harbor Bank and Trust Company Bar Harbor , ME 3.61% $4.67B
7 Maine Community Bank Portland , ME 3.55% $2.89B
8 Machias Savings Bank Machias , ME 3.53% $2.65B
9 Kennebunk Savings Bank Kennebunk , ME 3.51% $2.10B
10 Norway Savings Bank Norway , ME 3.46% $2.08B
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11 Camden National Bank Camden , ME 3.29% $6.95B
12 Partners Bank of New England Sanford , ME 3.28% $1.07B
13 Aroostook County Federal Savings & Loan Association Caribou , ME 3.21% $204.3M
14 Kennebec Savings Bank Augusta , ME 3.00% $1.83B
15 Auburn Savings Bank, FSB Auburn , ME 2.95% $101.8M
16 Bath Savings Institution Bath , ME 2.95% $1.50B
17 Androscoggin Savings Bank Lewiston , ME 2.88% $1.78B
18 Bangor Savings Bank Bangor , ME 2.86% $7.42B
19 First National Bank Damariscotta , ME 2.79% $3.17B
20 Gorham Savings Bank Gorham , ME 2.38% $1.61B
21 Saco & Biddeford Savings Institution Saco , ME 2.33% $1.46B
22 Bar Harbor Savings and Loan Association Bar Harbor , ME 2.04% $101.6M

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All data sourced from the most recent FFIEC call report filings, refreshed each quarter as new filings are processed. This leaderboard excludes banks with total assets under $100,000K to filter out anomalous micro-bank ratios. See /data-updates/ for the current data freshness window.

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