| Departments | Numbers |
| Academic Affairs | 945-3240 |
| Academic Effectiveness | 945-8611 |
| Academic Technology | 945-6767 |
| Adjunct - Business Tech | 945-3370 |
| Adjunct - Electronics | 945-3245 |
| Adjunct - Engineering | 945-9107 |
| Adjunct - Health Services | 945-3310 |
| Adjunct - Humanities | 945-3266 |
| Adjunct - Math | 945-8621 |
| Adjunct - Science | 945-3258 |
| Adjunct - Social Sciences | 945-9113 |
| Admissions | 945-3224 |
| Advisement Center | 945-9150 |
| Alumni Association | 945-8618 |
| Architecture/Construction | 945-3220 |
| Assessment Center | 945-8648 |
| Bookstore | 945-3201/ 945-3264 |
| Business & Industry Relations | 945-3228 |
| BUSINESS CONNECTIONS | 639-3672 |
| Business Services | 945-3203/945-3249 |
| Cafeteria | 945-3338 |
| Campus Events | 945-3387 |
| Career Services | 945-8680 |
| Catering | 945-3387 |
| Center for Safety & Emergency Preparedness | 945-3208 |
| Certified Nurse Aide Program | 945-8615 |
| Child Development Center | 945-3260 |
| CIS/TCOM | 945-3232 |
| Civil/Surveying | 945-3220 |
| CNA Program | 945-8615 |
| Community Outreach Program | 606-3318 |
| Computer Lab / BT Bldg. | 945-3339 |
| Construction/Maintenance | 945-6710 x502 |
| Copy Center | 945-3369 |
| Creative Services | 945-3368 |
| Cyber Cafe | 945-3209 |
| Deaf Student Services | 945-3288 |
| Deaf Student Services (TDD) | 945-9119 |
| Development (OSU Foundation) | 945-3327 |
| Division of Agriculture (Hort) | 945-3358 |
| Division of Arts & Sciences | 945-3256 |
| Division of Business Tech | 945-3232 |
| Division of Engineering | 945-3220 |
| Division of Health Services | 945-3210 |
| Division of Human Services | 945-9154 |
| Drafting & Design | 945-3220 |
| Drafting Lab (CAD) | 945-3374 |
| Electronic/Eng. ET200 | 945-3360 |
| Evening/Weekend Programs Coord. | 312-1555 cell/ 945-8620 office |
| Evening/Weekend Programs Coord. Cell Phone | 312-1555 |
| Extended Studies | 945-3395 |
| Extended Studies Lab | 945-3337 |
| Family Resource Center | 945-8691 |
| FAX - Admissions/Records | 945-3277 |
| FAX - Agriculture (Hort) | 945-3382 |
| FAX - Arts & Sciences | 945-9141 |
| FAX - Bookstore | 945-3213 |
| FAX - Business Office | 945-8610 |
| FAX - Business Technologies | 945-3329 |
| FAX - Cafeteria | 945-3398 |
| FAX - Campus Events | 945-3271 |
| FAX - Creative Services | 945-8610 |
| FAX - Development (OSU Foundation) | 945-3325 |
| FAX - Electronics/Eng. | 945-3262 |
| FAX - Engineering | 945-9144 |
| FAX - Financial Aid & Scholarships | 945-3319 |
| FAX - Health Services | 945-8613 |
| FAX - Human Resources | 945-6788 |
| FAX - Human Services | 945-8622 |
| FAX - Information Technologies | 945-3212 |
| FAX - Learning Center | 945-9131 |
| FAX - Library | 945-3289 |
| FAX - Payroll/Personnel | 945-8610 |
| FAX - Precision Driving Training Center | 945-8647 |
| FAX - Public Relations | 945-3325 |
| FAX - Science Dept. | 945-9158 |
| FAX - Student Activities | 945-9187 |
| FAX - Student Center & Campus Events | 945-3271 |
| FAX - Student Employment Services | 945-9180 |
| FAX - Student Services | 945-9127 |
| FAX - Talent Search | 945-9142 |
| FAX - Technology Education Center | 945-8616 |
| FAX - Upward Bound | 945-8628 |
| Financial Aid & Scholarships | 945-8646 |
| Fire Protection | 945-3236 |
| Fire Training Center | 297-1312 |
| Graphics | 945-3368 |
| GROUNDS | 945-6710 x500 |
| HELPDESK | 945-9118 |
| Hispanic Student Services | 945-9135 |
| Horticulture Greenhouse | 945-3344 |
| Horticulture Head House | 945-3343 |
| Housekeeping | 945-9178 |
| Human Resources | 945-3206 |
| Information Center | 945-9150 |
| Institutional Effectiveness | 945-9165 |
| Interpreter Training | 945-3288 |
| Learning Center | 945-8679 |
| Library | 945-3251 |
| Library Reference Desk | 945-3331 |
| Lost and Found | 945-3253 |
| Mail Room | 945-3307 |
| Main Number | 947-4421 |
| Maintenance | 945-8649 |
| Manufacturing Extension | 945-3396 |
| Oklahoma Garden Club | 945-3359 |
| Payroll | 945-3298 |
| Physical Plant | 945-6710 |
| Police Science | 945-3248 |
| Police Training Center | 297-1110 |
| Precision Driving Training Center | 945-3208 |
| President’s Office | 945-3200 |
| Print Shop | 945-3369 |
| Project REACH | 945-8683/945-3393 |
| Public Relations | 945-3317 |
| Purchasing | 945-3292 |
| REACH4Work | 945-9122 |
| Records | 945-8692 |
| Recruitment Services | 945-9183 |
| Registrar | 945-3252 |
| RURAL HEALTH OFFICE | 945-9197 |
| Security | 945-3253 |
| Security Emergency No. | 945-9111 |
| Student Activities/Campus Life | 945-3378 |
| Student Center & Campus Events | 945-3387/945-3238 |
| Student Government Assoc. | 945-8674 |
| Student Support Services | 945-8627 |
| Technology Education Center | 945-3373 |
| Technology Support Center | 945-6767 |
| Telephone Registration | 945-8678 |
| Transcripts | 945-8692 |
| Upward Bound | 945-8623 |
| Vet. Tech. Program | 945-9112 |
| Veterans Services | 945-3291 |
| Welcome Center / Campus Tours | 945-9150 |
| Wellness Center | 945-8642 |
