| S&T Bank | Indiana, PA | $8.0B | 74 |
| Sabine State Bank and Trust Company | Many, LA | $1.2B | 51 |
| Saco & Biddeford Savings Institution | Saco, ME | $1.0B | 7 |
| Safra National Bank of New York | New York, NY | $9.1B | 6 |
| Sage Capital Bank | Gonzales, TX | $611.7M | 8 |
| Salem Co-operative Bank | Salem, NH | $388.2M | 2 |
| Salem Five Cents Savings Bank | Salem, MA | $5.8B | 34 |
| Sallie Mae Bank | Salt Lake City, UT | $20.8B | 1 |
| Sanger Bank | Sanger, TX | $175.7M | 2 |
| Sanibel Captiva Community Bank | Sanibel, FL | $835.2M | 8 |
| Santander Bank | Wilmington, DE | $79.5B | 400 |
| Sauk Valley Bank & Trust Company | Sterling, IL | $620.6M | 9 |
| Savannah Bank | Savannah, NY | $174.2M | 5 |
| Savers Co-operative Bank | Southbridge, MA | $553.8M | 7 |
| SaviBank | Burlington, WA | $518.3M | 10 |
| Savings Bank | Primghar, IA | $240.9M | 3 |
| Savings Bank of Walpole | Walpole, NH | $738.3M | 7 |
| Sawyer Savings Bank | Saugerties, NY | $237.3M | 4 |
| Scale Bank | Edina, MN | $400.6M | 1 |
| Schaumburg Bank & Trust Company | Schaumburg, IL | $2.1B | 6 |
| Schertz Bank & Trust | Schertz, TX | $683.2M | 6 |
| Schuyler Savings Bank | Kearny, NJ | $107.3M | 2 |
| Scott State Bank | Bethany, IL | $176.4M | 7 |
| Scottsdale Community Bank | Scottsdale, AZ | $68.5M | 1 |
| Scribner Bank | Scribner, NE | $72.7M | 1 |
| Seacoast National Bank | Stuart, FL | $12.5B | 79 |
| Seamen's Bank | Provincetown, MA | $411.6M | 5 |
| Seattle Bank | Seattle, WA | $895.6M | 1 |
| Second Federal Savings and Loan Association of Philadelphia | Philadelphia, PA | $23.5M | 1 |
| Security Bank | New Auburn, WI | $195.8M | 4 |
| Security Bank | Tulsa, OK | $799.2M | 1 |
| Security Bank | Newbern, TN | $184.9M | 7 |
| Security Bank & Trust Company | Glencoe, MN | $1.1B | 26 |
| Security Bank and Trust Company | Miami, OK | $131.9M | 4 |
| Security Bank and Trust Company | Paris, TN | $1.2B | 15 |
| Security Bank Midwest | Tyndall, SD | $253.7M | 6 |
| Security Bank of Kansas City | Kansas City, KS | $3.0B | 36 |
| Security Bank of Texas | Crawford, TX | $125.8M | 4 |
| Security Bank, s.b. | Springfield, IL | $200.5M | 3 |
| Security Federal Bank | Aiken, SC | $1.4B | 19 |
| Security Federal Savings Bank | Logansport, IN | $371.8M | 8 |
| Security Financial Bank | Durand, WI | $806.8M | 8 |
| Security First Bank | Lincoln, NE | $1.7B | 25 |
| Security First Bank of North Dakota | New Salem, ND | $235.3M | 5 |
| Security National Bank of Omaha | Omaha, NE | $1.5B | 14 |
| Security National Bank of South Dakota | Dakota Dunes, SD | $189.7M | 3 |
| Security Savings Bank | Monmouth, IL | $212.2M | 2 |
| Security Savings Bank | Canton, SD | $464.2M | 8 |
| Security Savings Bank | Gowrie, IA | $162.8M | 8 |
| Security State Bank | Pearsall, TX | $804.1M | 7 |
| Security State Bank | Sutherland, IA | $307.7M | 5 |
| Security State Bank | Iron River, WI | $108.2M | 3 |
| Security State Bank | Radcliffe, IA | $113.2M | 4 |
| Security State Bank | Alexandria, SD | $93.3M | 3 |
| Security State Bank & Trust | Fredericksburg, TX | $1.7B | 21 |
| Security State Bank of Hibbing | Hibbing, MN | $135.7M | 1 |
| Security State Bank of Kenyon | Kenyon, MN | $58.4M | 1 |
| Security State Bank of Marine | Marine On St. Croix, MN | $201.0M | 4 |
| Security State Bank of Oklahoma | Wewoka, OK | $295.2M | 4 |
| Security State Bank of Wanamingo | Wanamingo, MN | $87.7M | 1 |
| SEI Private Trust Company | Oaks, PA | $0.5M | 1 |
| Select Bank | Forest, VA | $446.8M | 6 |
| Seneca Savings | Baldwinsville, NY | $233.4M | 5 |
| Sentry Bank | Saint Joseph, MN | $299.5M | 4 |
| Servbank,sb | Oswego, IL | $546.6M | 1 |
| ServisFirst Bank | Birmingham, AL | $13.9B | 33 |
| Sewickley Savings Bank | Sewickley, PA | $214.7M | 3 |
| Shamrock Bank | Coalgate, OK | $441.0M | 8 |
| Sharon Bank | Springfield, PA | $146.4M | 5 |
| Shelby Savings Bank, SSB | Center, TX | $339.5M | 6 |
| Sherburne State Bank | Becker, MN | $252.5M | 3 |
| Sherwood Community Bank | Creighton, MO | $66.5M | 4 |
| Shinhan Bank America | New York, NY | $1.6B | 14 |
| Shore United Bank | Easton, MD | $5.3B | 40 |
| Shoreham Bank | Warwick, RI | $431.0M | 4 |
| Sidney State Bank | Sidney, MI | $132.1M | 3 |
| Signature Bank | Rosemont, IL | $1.7B | 3 |
| Signature Bank | Toledo, OH | $1.1B | 1 |
| Signature Bank of Arkansas | Fayetteville, AR | $1.3B | 10 |
| Signature Bank of Georgia | Sandy Springs, GA | $206.0M | 2 |
| Silex Banking Company | Silex, MO | $81.0M | 1 |
| Silver Lake Bank | Topeka, KS | $412.6M | 6 |
| Simmons Bank | Pine Bluff, AR | $22.1B | 232 |
| Siouxland Bank | South Sioux City, NE | $73.5M | 1 |
| Skowhegan Savings Bank | Skowhegan, ME | $706.7M | 12 |
| Skyline National Bank | Independence, VA | $1.1B | 28 |
| Sloan State Bank | Sloan, IA | $67.5M | 2 |
| Slovenian Savings and Loan Association of Canonsburg | Strabane, PA | $515.1M | 1 |
| Slovenian Savings and Loan Association of Franklin-Conemaugh | Conemaugh, PA | $162.0M | 5 |
| Small Business Bank | Lenexa, KS | $74.3M | 1 |
| SmartBank | Pigeon Forge, TN | $4.9B | 42 |
| SmartBiz Bank | Northbrook, IL | $126.1M | 1 |
| SMBC ManuBank | Los Angeles, CA | $5.6B | 8 |
| SoFi Bank | Cottonwood Heights, UT | $29.7B | 4 |
| Solera National Bank | Lakewood, CO | $1.1B | 1 |
| Solon State Bank | Solon, IA | $85.3M | 3 |
| Solutions Bank | Forreston, IL | $375.1M | 6 |
| Solvay Bank | Solvay, NY | $1.1B | 9 |
| Somerset Regal Bank | Bound Brook, NJ | $851.4M | 14 |
| Somerset Trust Company | Somerset, PA | $2.0B | 45 |
| Somerville Bank | Eaton, OH | $249.3M | 8 |
| Sonata Bank | Brentwood, TN | $207.5M | 2 |
| Sooner State Bank | Tuttle, OK | $276.3M | 7 |
| Sound Banking Company | Lakewood, WA | $45.9M | 1 |
| Sound Community Bank | Seattle, WA | $909.1M | 10 |
| South Atlantic Bank | Myrtle Beach, SC | $1.6B | 12 |
| South Central Bank, Inc. | Glasgow, KY | $1.7B | 26 |
| South Coast Bank & Trust | Brunswick, GA | $238.4M | 2 |
| South Georgia Bank | Glennville, GA | $223.8M | 5 |
| South Georgia Banking Company | Omega, GA | $481.4M | 8 |
| South Lafourche Bank & Trust Company | Larose, LA | $141.3M | 4 |
| South Louisiana Bank | Houma, LA | $553.6M | 9 |
| South Ottumwa Savings Bank | Ottumwa, IA | $440.8M | 6 |
| South Shore Bank | South Weymouth, MA | $2.1B | 13 |
| South Story Bank & Trust | Slater, IA | $465.6M | 5 |
| SouthEast Bank | Farragut, TN | $3.0B | 15 |
| Southeast First National Bank | Summerville, GA | $59.5M | 3 |
| Southeastern Bank | Darien, GA | $533.4M | 10 |
| Southern Bancorp Bank | Arkadelphia, AR | $2.1B | 55 |
| Southern Bank | Spartanburg, SC | $298.9M | 7 |
| Southern Bank | Poplar Bluff, MO | $4.3B | 66 |
| Southern Bank and Trust Company | Mount Olive, NC | $4.5B | 56 |
| Southern Bank of Tennessee | Mount Juliet, TN | $413.5M | 5 |
| Southern First Bank | Greenville, SC | $3.7B | 12 |
| Southern Heritage Bank | Jonesville, LA | $356.9M | 10 |
| Southern Hills Community Bank | Leesburg, OH | $172.3M | 8 |
| Southern Illinois Bank | Johnston City, IL | $128.6M | 5 |
| Southern Michigan Bank & Trust | Coldwater, MI | $1.3B | 20 |
| Southern States Bank | Anniston, AL | $2.5B | 15 |
| SouthernTrust Bank | Marion, IL | $192.0M | 3 |
| SouthPoint Bank | Birmingham, AL | $1.5B | 11 |
| Southside Bank | Tyler, TX | $6.6B | 57 |
| SouthStar Bank, S.S.B. | Moulton, TX | $1.0B | 16 |
| SouthState Bank | Winter Haven, FL | $54.2B | 346 |
| SouthTrust Bank | George West, TX | $487.2M | 7 |
| Southwest Bank | Odessa, TX | $647.3M | 6 |
| Southwest Bank of Weatherford | Weatherford, OK | $67.0M | 1 |
| Southwest Capital Bank | Albuquerque, NM | $461.7M | 6 |
| Southwest Heritage Bank | Scottsdale, AZ | $798.3M | 8 |
| Southwest Missouri Bank | Carthage, MO | $998.7M | 11 |
| Southwest National Bank | Wichita, KS | $445.1M | 8 |
| Southwestern National Bank | Houston, TX | $1.1B | 9 |
| Sovereign Bank | Shawnee, OK | $1.1B | 9 |
| Spectra Bank | Fort Worth, TX | $94.9M | 2 |
| Spencer Savings Bank, SLA | Elmwood Park, NJ | $3.1B | 28 |
| SpiritBank | Tulsa, OK | $800.0M | 6 |
| Spiro State Bank | Spiro, OK | $81.5M | 3 |
| Spratt Savings Bank | Chester, SC | $117.0M | 2 |
| Spring Bank | Bronx, NY | $430.2M | 2 |
| Spring Bank | Brookfield, WI | $316.8M | 1 |
| Spring Hill State Bank | Longview, TX | $205.0M | 2 |
| Spring Valley Bank | Wyoming, OH | $70.9M | 1 |
| Spring Valley City Bank | Spring Valley, IL | $175.6M | 2 |
| Square Financial Services, Inc. | Salt Lake City, UT | $371.0M | 1 |
| SSB Bank | Pittsburgh, PA | $305.7M | 2 |
| SSB Community Bank | Strasburg, OH | $247.2M | 4 |
| St. Charles Bank & Trust Company | Saint Charles, IL | $2.9B | 10 |
| St. Clair State Bank (Incorporated) | Saint Clair, MN | $111.5M | 1 |
| St. Johns Bank and Trust Company | Saint Louis, MO | $270.1M | 4 |
| St. Landry Bank and Trust Company | Opelousas, LA | $274.0M | 7 |
| St. Louis Bank | Saint Louis, MO | $944.7M | 2 |
| St. Martin National Bank | Saint Martin, MN | $24.6M | 1 |
| Stafford Savings Bank | Stafford Springs, CT | $188.0M | 3 |
| Star Bank | Maple Lake, MN | $386.2M | 11 |
| STAR Financial Bank | Fort Wayne, IN | $2.6B | 37 |
| Starion Bank | Bismarck, ND | $1.8B | 16 |
| State Bank | Spencer, IA | $68.3M | 3 |
| State Bank | Brownsburg, IN | $723.5M | 10 |
| State Bank | Waterloo, IL | $259.9M | 5 |
| State Bank & Trust Co. | Nevada, IA | $171.8M | 1 |
| State Bank & Trust Company | Golden Meadow, LA | $132.2M | 4 |
| State Bank & Trust of Kenmare | Kenmare, ND | $166.9M | 3 |
| State Bank Financial | La Crosse, WI | $425.9M | 5 |
| State Bank Northwest | Spokane Valley, WA | $188.5M | 6 |
| State Bank of Bement | Bement, IL | $153.3M | 4 |
| State Bank of Burrton | Burrton, KS | $8.8M | 1 |
| State Bank of Cherry | Cherry, IL | $107.7M | 1 |
| State Bank of Chilton | Chilton, WI | $405.6M | 5 |
| State Bank of Cold Spring | Cold Spring, MN | $75.9M | 1 |
| State Bank of De Kalb | De Kalb, TX | $414.8M | 7 |
| State Bank of Downs | Downs, KS | $121.3M | 2 |
| State Bank of Graymont | Graymont, IL | $280.3M | 5 |
| State Bank of India | Chicago, IL | $3.1B | 1 |
| State Bank of India | New York, NY | $12.7B | 1 |
| State Bank of India (California) | Los Angeles, CA | $1.1B | 8 |
| State Bank of Lake Park | Lake Park, MN | $39.5M | 2 |
| State Bank of Medora | Medora, IN | $78.4M | 1 |
| State Bank of Missouri | Concordia, MO | $130.4M | 4 |
| State Bank of Newburg | Newburg, WI | $237.9M | 2 |
| State Bank of Reeseville | Reeseville, WI | $124.3M | 3 |
| State Bank of Southern Utah | Cedar City, UT | $2.3B | 17 |
| State Bank of Southwest Missouri | Springfield, MO | $147.1M | 1 |
| State Bank of St. Jacob | Saint Jacob, IL | $78.7M | 2 |
| State Bank of Table Rock | Table Rock, NE | $115.9M | 6 |
| State Bank of Texas | Irving, TX | $2.3B | 7 |
| State Bank of the Lakes | Antioch, IL | $2.0B | 9 |
| State Bank of Toulon | Toulon, IL | $283.4M | 3 |
| State Central Bank | Bonaparte, IA | $47.6M | 4 |
| State National Bank | Groom, TX | $52.6M | 1 |
| State Savings Bank | Frankfort, MI | $371.7M | 8 |
| State Savings Bank | West Des Moines, IA | $188.7M | 2 |
| State Street Bank and Trust Company | Boston, MA | $207.8B | 3 |
| State Street Bank and Trust Company | Quincy, IL | $295.8M | 3 |
| Stearns Bank | Saint Cloud, MN | $2.8B | 7 |
| Stellar Bank | Houston, TX | $8.7B | 54 |
| Sterling Bank | Poplar Bluff, MO | $1.3B | 16 |
| Sterling Federal Bank, F.S.B. | Sterling, IL | $407.9M | 9 |
| Sterling State Bank | Austin, MN | $341.2M | 6 |
| Stifel Bank | Saint Louis, MO | $10.7B | 1 |
| Stifel Bank and Trust | Saint Louis, MO | $16.9B | 2 |
| Stifel Trust Company | Saint Louis, MO | $851.8M | 2 |
| Stifel Trust Company Delaware | Greenville, DE | $292.6M | 1 |
| Stillman BancCorp | Stillman Valley, IL | $546.8M | 6 |
| Stock Yards Bank & Trust Company | Louisville, KY | $7.5B | 75 |
| Stockman Bank of Montana | Miles City, MT | $5.6B | 45 |
| Stockmens Bank | Colorado Springs, CO | $471.9M | 11 |
| Stone Bank | Mountain View, AR | $690.6M | 6 |
| StonehamBank, A Co-operative Bank | Stoneham, MA | $715.6M | 2 |
| Stoughton Co-operative Bank | Stoughton, MA | $116.5M | 1 |
| Streator Home Savings Bank | Streator, IL | $108.9M | 1 |
| Stride Bank | Enid, OK | $3.4B | 11 |
| Stryv Bank | Wichita, KS | $228.1M | 2 |
| Studio Bank | Nashville, TN | $860.5M | 2 |
| Sturdy Savings Bank | Stone Harbor, NJ | $989.4M | 13 |
| Sturgis Bank & Trust Company | Sturgis, MI | $882.5M | 17 |
| Sugar River Bank | Newport, NH | $343.8M | 6 |
| Sullivan Bank | Sullivan, MO | $1.1B | 11 |
| Sumitomo Mitsui Trust Bank (U.S.A.) Limited | Hoboken, NJ | $3.5B | 1 |
| Summit Bank | Eugene, OR | $1.1B | 5 |
| Summit Bank | Oakland, CA | $222.2M | 3 |
| Summit State Bank | Santa Rosa, CA | $922.6M | 5 |
| Sundown State Bank | Sundown, TX | $254.2M | 5 |
| Sunflower Bank | Dallas, TX | $7.2B | 72 |
| Sunmark Community Bank | Perry, GA | $332.9M | 6 |
| Sunnyside Federal Savings and Loan Association of Irvington | Irvington, NY | $76.0M | 1 |
| Sunrise Bank | Orlando, FL | $523.2M | 4 |
| Sunrise Banks | Sioux Falls, SD | $2.3B | 5 |
| Sunstate Bank | Miami, FL | $454.6M | 3 |
| Sunwest Bank | Sandy, UT | $3.2B | 9 |
| Superior National Bank | Hancock, MI | $842.0M | 10 |
| Superior Savings Bank | Superior, WI | $68.2M | 1 |
| Surety Bank | Deland, FL | $193.0M | 3 |
| Susquehanna Community Bank | West Milton, PA | $509.7M | 7 |
| Susser Bank | Dallas, TX | $2.3B | 11 |
| Sutton Bank | Attica, OH | $1.4B | 8 |
| Synchrony Bank | Draper, UT | $84.8B | 2 |
| Synergy Bank | Houma, LA | $1.1B | 10 |
| Synovus Bank | Columbus, GA | $50.8B | 245 |