Opelousas is also a common name of the flathead catfish.Opelousas is a small city in, and the parish seat of, St. Landry Parish, Louisiana, United States. Interstate 49 and U.S. Route 190 were constructed with a junction here. The population was 22,860 at the 2000 census. In 2004 the city annexed territory and population expected to give it more than 25,000 people in total. In the 2010 census, the population was 16,634. Opelousas is the principal... Show more

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