The House Democratic Caucus is a congressional caucus composed of all Democratic representatives in the United States House of Representatives, voting and non-voting, and is responsible for nominating and electing the Democratic Party leadership in the chamber. In its roles as a party conference, the caucus writes and enforces rules of conduct and discipline for its members, approves committee assignments, and serves as the primary forum for development of party policy and legislative priorities. It hosts weekly meetings for these purposes and to communicate the party's message to members.

Peter Rey Aguilar is an American politician who has been chair of the House Democratic Caucus since 2023. He has been the U.S. representative for California's 33rd congressional district since 2015. He served as mayor of Redlands, California, from 2010 to 2014, and as the president of the Inland Empire Division of the League of California Cities. Aguilar served on the Redlands City Council from 2006 until his election to Congress.