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. It is part of the Abbeville Micropolitan Statistical Area.
According to the United States Census Bureau, the town has a total area of 0.9 square miles (2.3 km), all land.
As of the census of 2000, there were 1,598 people, 644 households, and 416 families residing in the town. The population density was 1,874.9 people per square mile (725.9/km). There were 724 housing units at an average density of 849.5 per square mile (328.9/km). The racial makeup of the town was 86.61% White, 12.83% African American, 0.13% Native American, 0.31% from other races, and 0.13% from two or more races. Hispanic or Latino of any race were 1.25% of the population.
There were 644 households out of which 31.2% had children under the age of 18 living with them, 46.3% were married couples living together, 15.1% had a female householder with no husband present, and 35.4% were non-families. 31.1% of all households were made up of individuals and 15.5% had someone living alone who was 65 years of age or older. The average household size was 2.38 and the average family size was 2.99.
In the town, the population was spread out with 25.0% under the age of 18, 10.0% from 18 to 24, 23.5% from 25 to 44, 20.7% from 45 to 64, and 20.8% who were 65 years of age or older. The median age was 39 years. For every 100 females, there were 82.6 males. For every 100 females age 18 and over, there were 76.4 males.
The median income for a household in the town was $22,165, and the median income for a family was $32,039. Males had a median income of $25,682 versus $13,500 for females. The per capita income for the town was $13,738. About 16.1% of families and 21.0% of the population were below the poverty line, including 26.6% of those under age 18 and 21.9% of those age 65 or over.