| Acronym | Definition |
|---|
| HHS | Department of Health and Human Services |
| HHS | Highland High School (Bakersfield, CA) |
| HHS | Highland High School |
| HHS | Handelshögskolan I Stockholm (Stockholm School of Economics) |
| HHS | Heritage High School |
| HHS | Hamden High School (Connecticut) |
| HHS | Housing and Human Services (various locations) |
| HHS | Hamilton High School (USA) |
| HHS | Harrison High School |
| HHS | Hillcrest High School (USA) |
| HHS | Hampton High School (Virginia) |
| HHS | Huron High School (USA) |
| HHS | Homestead High School (various, USA) |
| HHS | Hudson High School (Hudson, Massachusetts) |
| HHS | Harrisonburg High School (Virginia) |
| HHS | Huntington High School (West Virginia) |
| HHS | Hays High School |
| HHS | Hillsborough High School (New Jersey) |
| HHS | Horizon High School |
| HHS | Hackensack High School (New Jersey) |
| HHS | Howell High School (Howell, Michigan) |
| HHS | Hillsdale High School (USA) |
| HHS | Hammond High School (Maryland) |
| HHS | Hickory High School |
| HHS | Hawthorne High School (various locations) |
| HHS | Howard High School (Maryland) |
| HHS | Healdsburg High School (Healdsburg, California) |
| HHS | Hernando High School (Florida) |
| HHS | Haverford High School (Havertown, PA) |
| HHS | Harlingen High School (Texas) |
| HHS | Hopewell High School (Virginia) |
| HHS | Holyoke High School (Holyoke, Massachusetts) |
| HHS | Hightstown High School (Hightstown, NJ) |
| HHS | Heidelberg High School (Heidelberg, MS, USA) |
| HHS | Hazen High School (Renton, Washington) |
| HHS | Harcourt Health Sciences |
| HHS | Hueneme High School (Oxnard, CA) |
| HHS | Henrico High School (Viginia) |
| HHS | Harpeth High School (Kingston Springs, Tennessee) |
| HHS | Hypothenar Hammer Syndrome |
| HHS | Hoyeraal-Hreidarsson Syndrome |
| HHS | Hempfield High School (Pennsylvania) |
| HHS | Houlton High School |
| HHS | Hobbs High School |
| HHS | Hispanic Honor Society |
| HHS | Haslett High School (Michigan) |
| HHS | Hononegah High School (Rockton, Il) |
| HHS | Horseheads High School |
| HHS | Hamlin High School (West Virginia) |
| HHS | Hauppauge High School (Hauppauge, NY) |
| HHS | Hollywood Historical Society (Florida) |
| HHS | Helix High School (La Mesa, CA, USA) |
| HHS | Hawkinsville High School (Georgia) |
| HHS | Hermantown High School (Hermantown, MN) |
| HHS | Headquarters and Headquarters Squadron |
| HHS | Hrvatski Hokejski Savez (Croatian Hockey Federation) |
| HHS | Hughesville High School (Pennsylvania) |
| HHS | Holdenville High School (Holdenville, Oklahoma) |
| HHS | Hall-Hitner Syndrome |
| HHS | Henryetta High School (Oklahoma) |
| HHS | Hindi High School (Mumbai, India) |
| HHS | Hrvatski Hrvacki Savez (Croatian Wrestling Association) |
| HHS | Hyperosmotic Hyperglycemic State |
| HHS | Hawarden High School (UK) |
| HHS | Hermiston High School (Oregon) |
| HHS | Hilltop High School (Chula Vista, CA) |
| HHS | Hollywood High School (Los Angeles, CA, USA) |
| HHS | Howell High School (New Jersey) |
| HHS | Health and Human Services |
| HHS | Harbor High School (California) |
| HHS | Hastings High School (Houston, Texas) |
| HHS | Hillsboro High School (Oregon) |
| HHS | Hemlock High School (Michigan) |
| HHS | Heritage Junior/Senior High School (Monroeville, Indiana) |
| HHS | Holland High School (Michigan) |
| HHS | Hillside High School (Durham, NC) |
| HHS | Hoover High School |