| Name | Company | Phone | Fax |
| O'Brien, Allen |
Landmark Electric Sign Group |
(219)762-9577 | (219)762-4259 |
| O'Brien, Kristen |
Harris Bank N. A. |
(219)769-7700 | (219)933-3984 |
| O'Donnell, Angie |
Custom Blend Coffee Service |
(219)923-1018 | |
| O'Donnell, Denise |
Custom Blend Coffee Service |
(219)923-1018 | |
| O'Malley, Maureen |
Healing Sanctuary Therapeutic Massage Center |
(219)641-7359 | (219)641-7359 |
| Officer, James |
University of Phoenix |
(317)558-3982 | (602)643-2981 |
| Olesek, Jan |
Challenger Learning Center of NWI |
(219)989-2007 | (219)989-3256 |
| Olthoff, Julie |
VIA Marketing, Inc. |
(219)769-2299 | (219)756-9505 |
| Olthoff, Ron |
VIA Marketing, Inc. |
(219)769-2299 | (219)756-9505 |
| Oman, Sherry |
Southlake Center For Mental Health |
(219)769-4005 | (219)769-2508 |
| Onyeukwu, Geoffrey |
Northwest Procedures Medical |
(219)884-3447 | (219)884-3512 |
| Orban, Linda |
Merle Norman/Trinkets |
(219)736-0000 | |
| Orosz, Karen |
Ivy Tech Community College of Indiana |
(219)981-4947 | (219)981-4431 |
| Ortegon, Karla |
Merrillville Chamber of Commerce |
(219)769-8180 | (219)736-6223 |
| Ortiz, Victor |
Food Bank of Northwest Indiana |
(219)980-1777 | (219)981-5122 |