| Abbreviation | Definition |
|---|---|
| HSUMC | Historical Society of the United Methodist Church |
| HTCA | Holy Trinity Church Aldershot |
| HTEC | Holy Trinity Episcopal Church |
| HTOC | Holy Transfiguration Orthodox Church |
| HTOC | Holy Trinity Orthodox Church |
| HUMC | Hamburg United Methodist Church |
| HUMC | Hampstead United Methodist Church |
| HUMC | Hempfield United Methodist Church |
| HUMC | Hermitage United Methodist Church |
| HUMC | Highland United Methodist Church |
| HUMC | Hilliard United Methodist Church |
| HVC | Hunt Valley Church |
| HVCC | Hickory Valley Christian Church |
| HWFC | His Way Family Church |
| IAC | International Affairs Committee |
| IBBC | International Bible Baptist Church |
| IBC | Irving Bible Church |
| IBCA | Independent Baptist Church of Anchorage |
| IBCB | International Baptist Church of Budapest |
| IBCC | Inventory of Byzantine Churches on Cyprus |