| Handshake (Student Jobs) | | | |
| Hazardous Materials | SBS 311 | 826-3302 | 826-3312 |
| Health & Physical Education (see: Kinesiology & Recreation Administration) | | | |
| Health & Wellbeing Services, Student | Health Center | 826-3146 | 826-5042 |
| Health Education | Recreation Wellness 123 | 826-5228 | |
| Health Portal | | | |
| Help Desk (Computer) | Library 101 | 826-4357 | |
| Herbarium, Vascular Plant | Science-D 161A | 826-4801 | |
| History | Founders Hall 180 | 826-3641 | 826-4496 |
| Housing & Residence Life | Jolly Giant Commons | 826-3451 | 826-5316 |
| Housing: Cashier | Jolly Giant Commons 313E | 826-5510 | 826-5316 |
| Housing: Custodial | Jolly Giant Commons | 826-3451 | 826-5316 |
| Housing: Grounds | Jolly Giant Commons | 826-5514 | 826-5316 |
| Housing: Maintenance | Jolly Giant Commons 201 | 826-3451 | 826-5316 |
| Housing: Off-Campus Resources | Jolly Giant Commons | 826-3451 | |
| Housing: Residential | Jolly Giant Commons | 826-3451 | 826-5316 |
| Human Performance Lab | KA 254 | 826-4979 | |
| Human Resources | Siemens Hall 212 | 826-3626 | 826-3625 |
| Human Subjects in Research | SBS 427 | 826-5165 | |
| Humboldt Bay Aquatic Center | 921 Waterfront Drive, Eureka | 826-5100 | |
| Humboldt Brand | Nelson Hall West 101 | 826-3321 | |
| Humboldt Digital Scholar | | | |
| Humboldt Economic Index | Siemens Hall 206E | 826-5544 | 826-3206 |
| Humboldt Institute for Interdisciplinary Marijuana Research | | 826-3216, 826-4446 | |
| Humboldt Journal of Social Relations | BSS 539c | 826-4354 | 826-4418 |
| Humboldt Music Academy | Music 128 | 826-3411 | 826-3528 |
| Humboldt Orientation Program (HOP) | Nelson Hall East 207 | 826-3510 | 826-5697 |
| Humboldt Science and Mathematics Center | Science A room 35 | 826-5552 | 826-3201 |
