| # | Institution | Type | Metro | Assets | Efficiency ratio |
|---|---|---|---|---|---|
| 1 | Wilmington Police & Fire Federal Credit Union Wilmington, DE | Credit Union | — | $13.8M | 110.03% |
| 2 | American Spirit Federal Credit Union Newark, DE | Credit Union | — | $69.5M | 106.56% |
| 3 | Priority Plus Federal Credit Union Wilmington, DE | Credit Union | — | $22.9M | 96.06% |
| 4 | Wilmington Trust, National Association Wilmington, DE | Bank | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD | $772.1M | 95.42% |
| 5 | Edu Federal Credit Union New Castle, DE | Credit Union | — | $44.1M | 91.88% |
| 6 | Provident Federal Credit Union Dover, DE | Credit Union | — | $12.0M | 91.14% |
| 7 | Delaware State Police Federal Credit Union Georgetown, DE | Credit Union | — | $139.3M | 83.69% |
| 8 |
| Credit Union |
| — |
| $470.8M |
| 82.81% |
| 9 | Dover Federal Credit Union Dover, DE | Credit Union | — | $734.9M | 81.84% |
| 10 | Eagle One Federal Credit Union Claymont, DE | Credit Union | — | $93.9M | 81.80% |
| 11 | Dexsta Federal Credit Union Wilmington, DE | Credit Union | — | $435.5M | 79.74% |
| 12 | Artisans' Bank Wilmington, DE | Bank | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD | $718.2M | 79.29% |
| 13 | Community Powered Federal Credit Union Bear, DE | Credit Union | — | $145.5M | 77.43% |
| 14 | Community Bank Delaware Lewes, DE | Bank | Salisbury, MD-DE | $443.6M | 75.70% |
| 15 | Del-One Federal Credit Union Dover, DE | Credit Union | — | $984.4M | 75.40% |
| 16 | TD Bank USA, National Association Wilmington, DE | Bank | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD | $32.13B | 70.31% |
| 17 | TD Bank, National Association Wilmington, DE | Bank | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD | $342.80B | 66.58% |
| 18 | PNC Bank, National Association Wilmington, DE | Bank | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD | $609.77B | 59.23% |
| 19 | New Castle County Delaware Em Federal Credit Union New Castle, DE | Credit Union | — | $32.1M | 57.93% |
| 20 | Wilmington Savings Fund Society, FSB Wilmington, DE | Bank | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD | $22.57B | 55.65% |
| 21 | Barclays Bank Delaware Wilmington, DE | Bank | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD | $43.45B | 54.95% |
| 22 | Santander Bank, N.A. Wilmington, DE | Bank | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD | $103.96B | 50.18% |
| 23 | Comenity Bank Wilmington, DE | Bank | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD | $7.37B | 49.79% |
| 24 | Applied Bank Wilmington, DE | Bank | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD | $274.1M | 42.34% |
| 25 | Deutsche Bank Trust Company Delaware Newark, DE | Bank | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD | $141.4M | 41.09% |
| 26 | County Bank Rehoboth Beach, DE | Bank | Salisbury, MD-DE | $696.4M | 38.02% |
| 27 | Delaware River & Bay Auth Emp Federal Credit Union New Castle, DE | Credit Union | — | $4.2M | 36.91% |
| 28 | Stepping Stones Community Federal Credit Union Wilmington, DE | Credit Union | — | $8.5M | 27.87% |
| 29 | Stifel Trust Company Delaware, National Association Greenville, DE | Bank | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD | $329.5M | 27.34% |
| 30 | BNY Mellon Trust of Delaware Wilmington, DE | Bank | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD | $254.9M | 22.80% |
| 31 | HSBC Trust Company (Delaware), National Association Wilmington, DE | Bank | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD | $57.2M | 19.92% |