Since Arizona became a U.S. state in 1912, it has sent congressional delegations to the United States Senate and United States House of Representatives. Each state elects two senators to serve for six years, and members of the House to two-year terms. Before becoming a state, the Arizona Territory elected a non-voting delegate at-large to Congress from 1864 to 1912.

Raúl Manuel Grijalva is an American politician and activist who serves as the United States representative for Arizona's 7th congressional district from 2023 to the present and Arizona's 3rd congressional district from 2003 to 2023. He is a member of the Democratic Party. The district, numbered as the 7th from 2003 to 2013, includes the western third of Tucson, part of Yuma and Nogales, and some peripheral parts of metro Phoenix. Grijalva is the dean of Arizona's congressional delegation.