The Alabama–Auburn football rivalry, better known as the Iron Bowl, is an American college football rivalry game between the University of Alabama Crimson Tide and the Auburn University Tigers, both charter members of the Southeastern Conference (SEC) and both located in the state of Alabama. The series is considered one of the most important rivalries in American sports.

The rivalry, which started in 1893 and has been renewed annually since 1948, was played for many years at Legion Field in Birmingham, Alabama. In the early 20th century, Birmingham was the leading industrial city of the South, rivaling Pittsburgh, Pennsylvania, in the production of pig iron, coke, coal and the manufacture of steel. Thus, the term "Iron Bowl" came to represent the rivalry. Auburn Coach Ralph "Shug" Jordan is credited with coining the name—when asked by reporters in 1964 how he would deal with the disappointment of not taking his team to a bowl game, he responded, "We've got our bowl game. We have it every year. It's the Iron Bowl in Birmingham."

The game was traditionally played on Thanksgiving weekend, but in 1993, the schools agreed to move the game up to the week before Thanksgiving to give themselves a bye for a potential SEC Championship Game berth after the game was introduced in the 1992 season. In 2007 the conference voted to disallow any team from having a bye before the league championship game, returning the game to its traditional Thanksgiving weekend spot.

The rivalry has long been one of the most heated collegiate rivalries in the country. It is all the more heated because the two schools have been among the nation's elite teams for most of the time since the 1950s. Together, they account for 38 SEC titles, 30 by Alabama and 8 by Auburn. Both are among the most successful programs in major college football history; Alabama is third in all-time total wins among Division I FBS schools while Auburn is 13th. The two schools have been fixtures on national television since the late 1970s; the only time since then that the season-ending clash has not been nationally televised was in 1993, when Auburn was barred from live TV due to NCAA sanctions. Alabama leads the series with a record of 52–37–1.

For much of the 20th century, the game was played every year in Birmingham, with Alabama winning 34 games and Auburn 18. Four games were played in Montgomery, Alabama, with each team winning two. In Birmingham's Legion Field, tickets were evenly divided between the two schools. In even years, Alabama was designated as home team and Auburn was the home team in odd-numbered years. Auburn broke with tradition in 1989, opting to move the game to its home stadium for the first time. The Tigers agreed to play one additional game as home team in Birmingham in 1991 before moving its home games permanently to Jordan-Hare Stadium in Auburn beginning in 1993. Alabama continued scheduling its home games in the series in Birmingham through the 1998 season before moving its home games to Bryant-Denny Stadium in Tuscaloosa permanently beginning in 2000.

The contest became the extension of a bitter political debate which took place in the Alabama State Legislature regarding the location of the new land-grant college under the state's application under the Morrill Land Grant Act of 1862 during the Civil War Reconstruction Era. The state legislature, influenced by a heavy contingent of representatives who were University of Alabama alumni, pushed to sell the land scripts of 240,000 acres acquired from the Morrill Act or have any new land holdings held in conjunction with the University of Alabama in Tuscaloosa. The debate lasted over four years, until Lee County and the City of Auburn won the location of the new university in 1872, after donating more than a hundred acres and the remaining buildings and property of the East Alabama Male College. At the time of the Auburn decision the state legislature and governorship were controlled by Radical Republicans such as "Scalawag" Southern Republicans and Freedman African-Americans. By 1874, former Confederate and "Redeemer" forces from the Democratic Party gradually overturned the Radicals' control of the Alabama state legislature. The Democrats then attempted to overturn most legislation passed during the Reconstruction Period, including the founding of the new land-grant college at Auburn.

During the 1870s, Auburn (then named the Agricultural and Mechanical College of Alabama) which received no appropriated funds from the state, was on the edge of financial collapse. Collapse of Auburn meant that the University of Alabama could assume the remaining land scripts, thus profiting from the closure of the new land-grant college. The University of Alabama remained closed till 1871 following the Civil War, during which it was partially destroyed by Union forces. "By 1877, competition between the University of Alabama and the Agricultural & Mechanical College for patronage had intensified. In January, Auburn President Isaac Tichenor reported to the board of trustees that Alabama had reduced its tuition and lowered its graduation standards. Tichenor responded by requesting that the board drop tuition and create a boarding department to further lower expenses." The University of Alabama had developed a reciprocal interest in the Alabama Coal Operators Association along with their “Big Mule” allies with vast timber holdings across the Black Belt of Alabama.

Alabama and Auburn played their first football game in Lakeview Park in Birmingham, Alabama, on February 22, 1893. Auburn won 32–22, before an estimated crowd of 5,000. Alabama considered the game to be the final matchup of the 1892 season while Auburn recorded it as the first matchup of 1893.