Cajun Field, American football stadium in Lafayette, Louisiana, United States

Cajun Field at Our Lady of Lourdes Stadium is an American football stadium on the South Campus of the University of Louisiana at Lafayette. It is a bowl with sideline seating and a second deck on the west sideline; renovations completed before the 2025 season give it a capacity of 30,392.

Planned since at least 1967, Cajun Field was built in 1970 to replace McNaspy Stadium and opened on September 25, 1971, with a shutout of Santa Clara University. On September 14, 1996, 38,783 spectators saw the Cajuns beat 25th-ranked Texas A&M 29-22, their first win over a ranked opponent. After Hurricane Katrina, the 2005 New Orleans Bowl was played here, Southern Miss defeating Arkansas State 31-19.

The nickname "The Swamp" appeared on stadium signage and in the school yearbook in 1988, and in the 1989 media guide. It recalls the university's first football field, laid out next to a small cypress pond that became Cypress Lake, also called The Swamp. The name also matches the surrounding bayous and wetlands.

The field lies two feet below sea level in a natural bowl, so most fans walk down to their seats. Four 60-horsepower pumps and a drainage system keep the surface playable during south Louisiana rainstorms. Players enter through a tunnel from the athletics complex.

The playing surface sits approximately 2 feet below sea level and relies on specialized drainage systems to prevent flooding. This geographic challenge makes it a notable example of sports construction in a wetland environment.