| Acronym | Definition |
|---|
| HTLC | Holy Trinity Lutheran Church (various locations) |
| HTLC | Hampshire Teaching and Leadership College (UK) |
| HTLC | Harmon's Tree & Lawn Care (Florida) |
| HTLC | High Temperature Liquid Composting |
| HTLC | Harriet Tubman Literary Circle (Texas) |
| HTLC | High-Temperature Liquid Chromatography (chemistry) |
| HTLC | Harvard Taiwan Leadership Conference (US and Taiwan) |
| HTLC | Hair Textures Long Curls |
| HTLC | High Tech Law Certificate (Santa Clara University; California) |
| HTLC | Hero's Tournament Lacrosse Club (Maryland) |
| HTLC | High Turbulence Liquid Chromatography |
| HTLC | High-Throughput Liquid Chromatography |
| HTLC | Human Trafficking Legislative Circle (advocacy) |
| HTLC | Harcourt Teacher Leadership Center (Franklin Institute; Philadelphia, PA) |
| HTLC | Hubbard-Teed Learning Community (Idaho) |