It's worth pointing out that when Republicans came to power in the House after the 1994 election, Speaker Gingrich wanted to consolidate his power - and that of the Republican Party - and weakened caucuses by cutting funds for staff. He did the same to committees. This is part of the reason parties are as strong as they are in Congress today. Other opposing organizations have been weakened. Since these organization once served to bring members together despite party membership, this may help explain the polarization we see today.
Anyway, here is the list. Some caucuses have more than one area member. That's what the numbers mean. Have fun.
9-11 Commission Caucus
10th Amendment Task Force
Aerospace Caucus
Algeria Caucus
Alzheimer’s Taskforce
Anti-Terrorism Caucus
Army Caucus
Arts Caucus
Asian Pacific American Caucus
Autism Caucus
Balanced Budget Amendment Caucus
Beef Caucus
Bi-Cameral Congressional Caucus on Parkinson’s Disease
Bipartisan Congressional Prayer Caucus
Bipartisan Congressional Refugee Caucus
Brazil Caucus
Building a Better America Caucus (BABAC)
Career and Technical Education Caucus
Children's Caucus - 2
Children and Families Task Force
Childhood Cancer Caucus
Coal Caucus
Coastal Caucus
Community College Caucus
Congressional Black Caucus - 2
Congressional Hispanic Conference
Congressional Vision Caucus
Conservative Caucus RSC
Constitution Caucus
Cyber Security Caucus
Cystic Fibrosis Caucus - 2
Democratic Israel Working Group
Democratic Outreach Task Force
Diabetes Caucus - 2
Diversity and Innovation Caucus
Entertainment Industries Caucus
Ethiopia and Ethiopian-Americans Caucus
European Union Caucus
Faith and Values in Politics Task Force
Fight & Control Methamphetamine Caucus
Fire Services Caucus – 2
French Caucus
Friends of Jordan Caucus
Friends of Norway Caucus
General Aviation Caucus
Gulf Coast Caucus
Gulf of Mexico Caucus
High Tech Caucus – 2
Homeland Security Task Force
House Aerospace Caucus
House Hunger Caucus
Human Rights Caucus
House Trade Working Group
Immigration Reform Caucus
Immigration Task Force
India and Indian Affairs Caucus
Interstate 69 Caucus
International Conservation Caucus
Internet Caucus
Israel Allies Caucus
Judicial Branch Caucus
Katrina Task Force
Labor and Working Families Caucus
Law Enforcement Caucus
Manufacturing Caucus
Men’s Health Caucus|
Missing and Exploited Children’s Caucus - 3
Multiple Sclerosis Caucus
National Guard and Reserve Caucus
National Guard and Reserve Components Caucus
National Marine Sanctuary Caucus
National Wildlife Refuge Caucus
Native American Caucus
Natural Gas Caucus – 3
Nigeria Caucus
Out of Iraq Caucus
Pakistan Caucus
Pell Grant Caucus
P.O.R.T.S (Ports Opportunity, Renewal, Trade, and Security) Caucus – 2
Port Security Caucus
Ports to Plains Caucus
Progressive Caucus
Property Rights Action Caucus
Recycling Caucus - 2
Renewable Energy and Energy Efficiency Caucus
Republican Study Committee
Rice Caucus
Rural Caucus
Science and National Labs Caucus
Second Amendment Task Force
Songwriters Caucus
Sportsmen's Caucus
Sudan Caucus
Steel Caucus
Taiwan Caucus
Tea Party Caucus
TEX-21 Congressional Caucus
Traumatic Brain Injury Task Force
Tri-Caucus
Turkey and Turkish Americans Caucus
Urban Caucus
US-Afghan Caucus
USO Caucus
Victims Right’s Caucus – 3
Vision Caucus
Western Caucus
Wireless Caucus
Women’s Issues Caucus
10th Amendment Task Force
Aerospace Caucus
Algeria Caucus
Alzheimer’s Taskforce
Anti-Terrorism Caucus
Army Caucus
Arts Caucus
Asian Pacific American Caucus
Autism Caucus
Balanced Budget Amendment Caucus
Beef Caucus
Bi-Cameral Congressional Caucus on Parkinson’s Disease
Bipartisan Congressional Prayer Caucus
Bipartisan Congressional Refugee Caucus
Brazil Caucus
Building a Better America Caucus (BABAC)
Career and Technical Education Caucus
Children's Caucus - 2
Children and Families Task Force
Childhood Cancer Caucus
Coal Caucus
Coastal Caucus
Community College Caucus
Congressional Black Caucus - 2
Congressional Hispanic Conference
Congressional Vision Caucus
Conservative Caucus RSC
Constitution Caucus
Cyber Security Caucus
Cystic Fibrosis Caucus - 2
Democratic Israel Working Group
Democratic Outreach Task Force
Diabetes Caucus - 2
Diversity and Innovation Caucus
Entertainment Industries Caucus
Ethiopia and Ethiopian-Americans Caucus
European Union Caucus
Faith and Values in Politics Task Force
Fight & Control Methamphetamine Caucus
Fire Services Caucus – 2
French Caucus
Friends of Jordan Caucus
Friends of Norway Caucus
General Aviation Caucus
Gulf Coast Caucus
Gulf of Mexico Caucus
High Tech Caucus – 2
Homeland Security Task Force
House Aerospace Caucus
House Hunger Caucus
Human Rights Caucus
House Trade Working Group
Immigration Reform Caucus
Immigration Task Force
India and Indian Affairs Caucus
Interstate 69 Caucus
International Conservation Caucus
Internet Caucus
Israel Allies Caucus
Judicial Branch Caucus
Katrina Task Force
Labor and Working Families Caucus
Law Enforcement Caucus
Manufacturing Caucus
Men’s Health Caucus|
Missing and Exploited Children’s Caucus - 3
Multiple Sclerosis Caucus
National Guard and Reserve Caucus
National Guard and Reserve Components Caucus
National Marine Sanctuary Caucus
National Wildlife Refuge Caucus
Native American Caucus
Natural Gas Caucus – 3
Nigeria Caucus
Out of Iraq Caucus
Pakistan Caucus
Pell Grant Caucus
P.O.R.T.S (Ports Opportunity, Renewal, Trade, and Security) Caucus – 2
Port Security Caucus
Ports to Plains Caucus
Progressive Caucus
Property Rights Action Caucus
Recycling Caucus - 2
Renewable Energy and Energy Efficiency Caucus
Republican Study Committee
Rice Caucus
Rural Caucus
Science and National Labs Caucus
Second Amendment Task Force
Songwriters Caucus
Sportsmen's Caucus
Sudan Caucus
Steel Caucus
Taiwan Caucus
Tea Party Caucus
TEX-21 Congressional Caucus
Traumatic Brain Injury Task Force
Tri-Caucus
Turkey and Turkish Americans Caucus
Urban Caucus
US-Afghan Caucus
USO Caucus
Victims Right’s Caucus – 3
Vision Caucus
Western Caucus
Wireless Caucus
Women’s Issues Caucus