DeQuincy is the northernmost city in Calcasieu Parish, Louisiana, United States. The population was 3,235 at the 2010 census. DeQuincy is part of the Lake Charles Metropolitan Statistical Area.
DeQuincy is located in northern Calcasieu Parish at 30°27′3″N 93°26′8″W / 30.45083°N 93.43556°W / 30.45083; -93.43556 (30.450915, -93.435613). Louisiana Highways 12 and 27 pass through the center of town: LA 12 leads east 36 miles (58 km) to Kinder and southwest 22 miles (35 km) to Deweyville, Texas, while LA 27 leads north 31 miles (50 km) to DeRidder and south 17 miles (27 km) to Sulphur, 9 miles (14 km) west of Lake Charles.
According to the United States Census Bureau, DeQuincy has a total area of 3.2 square miles (8.2 km), all land.
As of the census of 2000, there were 3,398 people, 1,332 households, and 916 families residing in the city. The population density was 1,066.1 people per square mile (411.3/km²). There were 1,500 housing units at an average density of 470.6 per square mile (181.6/km²). The racial makeup of the city was 79.25% White, 19.07% African American, 0.53% Native American, 0.18% Asian, 0.18% from other races, and 0.79% from two or more races. Hispanic or Latino of any race were 0.82% of the population.
There were 1,332 households out of which 33.8% had children under the age of 18 living with them, 51.1% were married couples living together, 14.6% had a female householder with no husband present, and 31.2% were non-families. 28.8% of all households were made up of individuals and 15.1% had someone living alone who was 65 years of age or older. The average household size was 2.50 and the average family size was 3.06.
In the city, the population was spread out with 27.1% under the age of 18, 9.4% from 18 to 24, 26.8% from 25 to 44, 20.8% from 45 to 64, and 15.9% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 86.9 males. For every 100 females age 18 and over, there were 80.7 males.
The median income for a household in the city was $26,802, and the median income for a family was $34,712. Males had a median income of $35,893 versus $17,778 for females. The per capita income for the city was $13,847. About 14.2% of families and 19.1% of the population were below the poverty line, including 24.7% of those under age 18 and 15.2% of those age 65 or over.