United States congressional delegations from Arizona

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, beginning with the 63rd United States Congress in 1913. Before becoming a state, the Arizona Territory elected a non-voting delegate at-large to Congress from 1864 to 1912. Each state elects two senators to serve for six years, and varying numbers of members of the House, depending on state population, to two-year terms. Arizona has sent nine members to the House in each delegation since the 2010 United States Census.

A total of 59 people have served Arizona in the House and 15 have served Arizona in the Senate. The first woman to serve Arizona in the House was Isabella Greenway. Seven women have served Arizona in the House, including Kyrsten Sinema and Martha McSally, who also served Arizona in the Senate, the only women to do so.

The current deans, or longest-serving members, of the Arizona delegation are Republican Representatives David Schweikert of the 1st district and Paul Gosar of the 9th district, who have both served in the House since 2011. Carl Hayden was Arizona's longest-serving senator, and his 56 years as a senator is the sixth-longest tenure in American history.