Opelousas is a city located in St. Landry Parish, Louisiana, United States. It is the third-oldest city in Louisiana and is known for its rich history and cultural heritage. Opelousas is often referred to as the "Zydeco Capital of the World" because of its contribution to the development and popularity of zydeco music. The city has a population of approximately 22,000 residents and covers an area of 7.5 square miles. Opelousas is home to various historic sites, museums, and festivals that celebrate its French and Creole heritage. The city's economy relies on industries such as agriculture, healthcare, and retail.