Breaux Bridge is a city in St. Martin Parish, Louisiana, United States. The population was 7,513 in 2020. It is part of the Lafayette metropolitan …Breaux Bridge is a city in St. Martin Parish, Louisiana, United States. The population was 7,513 in 2020. It is part of the Lafayette metropolitan statistical area. Originally dubbed La Capitale Mondiale de l’Écrevisse, by its French-speaking residents, Breaux Bridge was officially designated the "Crawfish Capital of the World" by Bob Angelle, then serving as Speaker of the Louisiana House of Representatives.