| Routing Number | Bank Name | Bank Address | City | State |
| O'Bannon Banking Company |
119 South Maple | Buffalo | MO |
| Oahe Credit Union |
PO Box 818 | Pierre | SD |
| Oak Bank |
5951 Mckee Road | Fitchburg | WI |
| Oak Bank |
1000 North Rush Street | Chicago | IL |
| Oak Cliff Christian Credit Union |
1130 W. Camp Wisdom Road | Dallas | TX |
| Oak Creek Valley Bank |
108 West Second Street | Valparaiso | NE |
| Oak Valley Community Bank |
125 North Third Avenue | Oakdale | CA |
| Ocean Bank |
780 N.W. 42nd Avenue | Miami | FL |
| Ocean City Home Bank |
1001 Asbury Ave | Ocean City | NJ |
| OceanFirst Bank |
975 Hooper Avenue | Toms River | NJ |
| Oceanic Bank |
130 Battery Street | San Francisco | CA |
| Oceanside Bank |
1315 South Third Street | Jacksonville Bea | FL |
| Oceanside Christopher Credit Union |
45 ATLANTIC AVENUE | Oceanside | NY |
| Ochsner Clinic Credit Union |
1514 Jefferson Hwy Room 300 | New Orleans | LA |
| Oconee State Bank |
Main Street | Watkinsville | GA |
| Odjfs Credit Union |
4020 E Fifth Ave | Columbus | OH |
| Oglesby State Bank |
117 Fm Highway 1996 | Oglesby | TX |
| Oglethorpe Bank |
3024 Cypress Mill Road | Brunswick | GA |
| Ohio Catholic Credit Union |
13623 ROCKSIDE ROAD | Garfield Hts | OH |
| Ohio Commerce Bank |
24400 Chagrin Blvd, # 100 | Beachwood | OH |
| Ohio Heritage Bank |
200 Main Street | Coshocton | OH |
| Ohio Valley Credit Union |
2091 JAMES E SAULS SR DRIVE | Batavia | OH |
| Ohio Valley Financial Group |
140 North Main Street | Henderson | KY |
| Ohnward Bank & Trust |
332 1st Avenue West | Cascade | IA |
| Oil Country Credit Union |
1050 E. SPRING STREET | Titusville | PA |
| Ojai Community Bank |
402 West Ojai Avenue | Ojai | CA |
| Ok Credit Union |
3900 SE Adams Rd | Bartlesville | OK |
| Oklahoma Credit Union |
517 NE 36th St | Oklahoma City | OK |
| Oklahoma State Bank |
120 West Canadian Street | Vinita | OK |
| Oklahoma State Bank |
2610 South Division Avenue | Guthrie | OK |
| Oklahoma State Bank |
Main Street | Buffalo | OK |
| Old Florida National Bank |
502 North Highway 17-92 | Longwood | FL |
| Old Harbor Bank |
2605 Enterprise Rd East, # 1 | Clearwater | FL |
| Old Line Bank |
1525 Pointer Ridge Place | Bowie | MD |
| Old Mission Bank |
2701 1-75 Business Spur | Sault Ste. Marie | MI |
| Old Missouri Bank |
3570 South National | Springfield | MO |
| Old National Bank |
1 Main Street | Evansville | IN |
| Old National Bank |
1 Main Street | Evansville | IN |
| Old National Bank |
1 Main Street | Evansville | IN |
| Old South Credit Union |
148 N SHIELDS LANE | Natchez | MS |
| Old West Credit Union |
650 W Main St | John Day | OR |
| Oldham Family Alliance Credit Union |
8601 Honeygo Blvd., Suite H | Baltimore | MD |
| OldTown Bank |
2045 South Main Street | Waynesville | NC |
| Olean Area Credit Union |
1201 Wayne St | Olean | NY |
| Omaha Credit Union |
3001 S 82ND AVE | Omaha | NE |
| Omaha Douglas Credit Union |
8251 West Center Rd | Omaha | NE |
| Omaha Police Credit Union |
3003 S 82nd Avenue | Omaha | NE |
| Omaha State Bank |
12100 West Center Road | Omaha | NE |
| Omega Credit Union |
206 Siebert Road | Pittsburgh | PA |
| Omega Psi Phi Fraternity Credit Union |
c/o SAMSCU, 455 Buford Hwy | Suwanee | GA |
| Omni Bank |
2900 Ridgelake Drive | Metairie | LA |
| OmniAmerican Bank |
1320 S. University Drive | Fort Worth | TX |
| ONB Bank and Trust Company |
8908 S Yale Ave, Suite 100 | Tulsa | OK |
| One Community Credit Union |
531 5th Street | Parkersburg | WV |
| One Georgia Bank |
1180 Peachtree St, Ne, # 261 | Atlanta | GA |
| One Source Credit Union |
8870 Gazelle | El Paso | TX |
| One South Bank |
1414 Main Street, Suite 4 | Chipley | FL |
| One Vision Credit Union |
PO Box 2007 | Clarksville | IN |
| One World Bank |
2449 Walnut Hill Lane | Dallas | TX |
| OneCalifornia Bank, FSB |
1438 Webster St., Suite 100 | Oakland | CA |
| OneUnited Bank |
100 Franklin St | Boston | MA |
| OneWest Bank, FSB |
888 E Walnut St | Pasadena | CA |
| OneWest Bank, FSB |
888 E Walnut St | Pasadena | CA |
| Onomea Credit Union |
P.O. Box 19 | Papaikou | HI |
| Ontario Shores Credit Union |
PO Box 9 | Newfane | NY |
| Oostburg State Bank |
905 Center Avenue | Oostburg | WI |
| Orange Bank of Florida |
519 North Magnolia | Orlando | FL |
| Orange Community Bank |
1045 West Katella Avenue | Orange | CA |
| Orange County Business Bank |
4675 Macarthur Court, # 100 | Newport Beach | CA |
| Orange County Trust Company |
75 North Street | Middletown | NY |
| Orange Savings Bank, ssb |
812 Sixteenth Street | Orange | TX |
| Orange Savings Bank, ssb |
812 Sixteenth Street | Orange | TX |
| Oregon Coast Bank |
909 Se Bay Boulevard | Newport | OR |
| Oregon Community Bank & Trust |
733 North Main Street | Oregon | WI |
| Oregon Employees Credit Union |
PO Box 2227 | Salem | OR |
| Oregon Pioneer Credit Union |
17884 SE McLoughlin Blvd | Portland | OR |
| Oregon Trail Bank |
Whalen St. & Wyoming Ave. | Guernsey | WY |
| Oriental Bank and Trust |
997 Professional Office Park | San Juan | PR |
| Oritani Bank |
370 Pascack Road | Township Of Wash | NJ |
| Ornl Credit Union |
P.O. Box 365 | Oak Ridge | TN |
| Orrstown Bank |
77 East King Street | Shippensburg | PA |
| OSB Community Bank |
417 South Main Street | Brooklyn | MI |
| Ossian State Bank |
102 North Jefferson Street | Ossian | IN |
| Oswego Community Bank |
10 North Madison Street | Oswego | IL |
| Oswego Heritage Credit Union |
P.O. Box 180 | Fulton | NY |
| Otero Credit Union |
P.O. Box 2800 | Alamogordo | NM |
| Otis Credit Union |
PO Box 27 | Jay | ME |
| Ots Employees Credit Union |
811 MIDDLE STREET | Honolulu | HI |
| Ottawa Savings Bank |
925 Lasalle St | Ottawa | IL |
| Ouachita Independent Bank |
909 North 18th Street | Monroe | LA |
| Ouachita Valley Credit Union |
P O Box 1477 | West Monroe | LA |
| Our Family Credit Union |
PO Box 4044 | Lancaster | PA |
| Owen County State Bank |
201 West Morgan Street | Spencer | IN |
| Owensboro Credit Union |
717 Harvard Drive | Owensboro | KY |
| Oxford Bank |
60 South Washington Street | Oxford | MI |
| Oxford Bank & Trust |
1111 W. 22nd St., Suite 800 | Oak Brook | IL |
| Oxford Credit Union |
PO BOX 252 | Mexico | ME |
| Oxford University Bank |
1550 University Avenue | Oxford | MS |
| Ozark Bank |
106-112 North 2nd Avenue | Ozark | MO |
| Ozark Mountain Bank |
400 South Commercial Street | Branson | MO |