Gueydan (local pronunciation [ge(ɪ)dɔ̃]) is a town in Vermilion Parish, Louisiana, United States. The population was 1,398 at the 2010 census, down from 1,598 in 2000. At the 2020 population estimates program, its population decreased to 1,328. It is portion of the Abbeville micropolitan statistical area.

For thousands of years, indigenous peoples lived along the waterways of Louisiana. They were practiced to hunt profuse game and harvest fish from the rivers. In historic times, this area was inhabited by the Attakapa and Chitimacha.

In the further on 1860s, Jean Pierre Gueydan, (originally spelled “Guédon”) the founder of the European-American town, lived in Abbeville, Louisiana, about 30 miles east of present-day Gueydan. As had the Attapaka and earlier American Indian tribes, he often came to this Place to hunt deer, ducks, geese, pheasant, cache-cache (jack snipe), papabottes, and supplementary game. The area was a hunter’s paradise.

In 1884 the brothers Jean-Pierre and François Gueydan purchased forty thousand acres (160 km) of estate described by surveyors as “sea marsh, unfit for cultivation”, for twelve and one-half cents per acre. By 1896 a little portion of their purchase became known as the “Gueydan Pasture”. It was chartered as a village considering the population reached 250. Jean Pierre was considered the attributed founder of Gueydan, as by then he had purchased his brother’s landholdings. In 1902, the agreement became the town of Gueydan. Many residents were energetic in the farming of rice along the waterways, as the area’s most important commodity crop.