H
- Historic Preservation Caucus (2003–present)
- House Aerospace Caucus
- House Afterschool Caucus (2005–present)
- House Agriculture Energy Users Caucus
- House Army Caucus
- House Baltic Caucus (1999–present)
- House Beef Caucus
- House Biofuels Caucus
- House Democratic Caucus (1948–present)
- House Military Depot and Industrial Facilities Caucus
- House Oceans Caucus (1999–present)
- House Reading Caucus
- House Recycling Caucus (March 1998–present), founded by Anne Meagher Northup
- House Republican Israel Caucus
- House Rural Health Care Coalition
- House Science, Technology, Engineering, and Mathematics Education Caucus
- House Trade Working Group
- House Trails Caucus
- Hudson River Caucus (2004–present)
- Hungarian American Caucus (June 4, 2003–present)
Read more about this topic: Caucuses Of The United States Congress