| HHS | Department of Health and Human Services | |
| HHS | Highland High School | |
| HHS | Highland High School (Bakersfield, CA) | |
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| 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) | |
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| 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 | Health and Human Services | |
| HHS | Heart-Hand Syndrome (group of genetic disorders) | |
| HHS | Helpers of the Holy Souls (est. 1856; religious society) | |
| HHS | Hemlock High School (Michigan) | |
| HHS | Hanford High School (Richland, WA) | |
| HHS | Harbor High School (California) | |
| HHS | Haven Humane Society (Anderson, CA) | |
| HHS | Hastings High School (Houston, Texas) | |
| HHS | Hindu-Hitachi Scholarships (est. 1959; India and Japan) | |
| HHS | Hillsboro High School (Oregon) | |
| HHS | Hillside High School (Durham, NC) | |
| HHS | Hilltop High School (Chula Vista, CA) | |
| HHS | Hermiston High School (Oregon) | |
| HHS | Heritage Humane Society (Williamsburg, VA) | |
| HHS | Heritage Junior/Senior High School (Monroeville, Indiana) | |
| HHS | Holland High School (Michigan) | |
| HHS | Hollywood High School (Los Angeles, CA, USA) | |
| HHS | Historical Harp Society | |
| HHS | Hoover High School | |
| HHS | House to House Survey (various locations) | |
| HHS | Household Health Survey (various organizations) | |
| HHS | Housing Hospitality Services (University of California, Los Angeles) | |
| HHS | Huguenot Historical Street (New York) | |
| HHS | Hundred Houses Society (UK) | |
| HHS | Hudson Historical Society (Hudson, MA) | |
| HHS | Howell High School (New Jersey) | |