Location of Kirbyville, Texas
|• Mayor||Frank George|
|• Total||2.4 sq mi (6.3 km2)|
|• Land||2.4 sq mi (6.3 km2)|
|• Water||0.0 sq mi (0.0 km2)|
|Elevation||112 ft (34 m)|
|• Density||856.1/sq mi (330.5/km2)|
|Time zone||Central (CST) (UTC-6)|
|• Summer (DST)||CDT (UTC-5)|
|GNIS feature ID||1360696|
Kirbyville is located at (30.659203, -93.896852).
According to the United States Census Bureau, the city has a total area of 2.4 square miles (6.2 km2), of which, 2.4 square miles (6.2 km2) of it is land and 0.41% is covered by water.
The climate of Kirbyville and surrounding areas consists of mainly hot and humid summers, while winters are usually mild. According to the Köppen Climate Classification system, Kirbyville has a humid subtropical climate, mainly because of its close proximity to the warm waters of the Gulf of Mexico. 
The town was first established in 1895 when the Gulf, Beaumont, and Kansas City railroad reached the site. It was first named Kirby for John Henry Kirby, a lumber businessman who intended to use the site for building a facility to market his lumber. The post office was established the same year, but the name was changed to Kirbyville when a town already called Kirby was discovered. The town became incorporated in 1926.
- The Calaboose Museum in Kirbyville displays artifacts from the city's rich history.
- The Palace Theater in Downtown Kirbyville hosts the Country Music Show on the second Saturday of every month.
- The EO Siecke State Forest, roughly 4 miles southeast of Kirbyville, is a heavily forested area, mainly home to pine trees.
As of the census of 2000, 2,085 people, 828 households, and 550 families resided in the city. The population density was 856.1 people per square mile (329.9/km²). The 931 housing units averaged 382.2 per square mile (147.3/km²). The racial makeup of the city was 76.31% White, 21.20% African American, 0.34% Native American, 0.29% Asian, 1.20% from other races, and 0.67% from two or more races. Hispanics or Latinos of any race were 2.69% of the population.
Of the 828 households, 32.5% had children under the age of 18 living with them, 43.5% were married couples living together, 18.8% had a female householder with no husband present, and 33.5% were not families. About 30.7% of all households were made up of individuals, and 14.6% had someone living alone who was 65 years of age or older. The average household size was 2.42 and the average family size was 3.01.
In the city, the population was distributed as 27.4% under the age of 18, 9.0% from 18 to 24, 24.3% from 25 to 44, 21.0% from 45 to 64, and 18.4% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 79.3 males. For every 100 females age 18 and over, there were 72.2 males.
The median income for a household in the city was $25,438, and for a family was $32,381. Males had a median income of $30,144 versus $20,060 for females. The per capita income for the city was $12,839. About 22.6% of families and 26.1% of the population were below the poverty line, including 33.9% of those under age 18 and 17.2% of those age 65 or over.
The City of Kirbyville is served by the Kirbyville Consolidated Independent School District and home to the Kirbyville High School Wildcats.
- Ivory Joe Hunter, R&B singer, was born in Kirbyville in 1914.
- Ernest "Bubba" Bean was born in Kirbyville in 1954, graduated from Kirbyville High School in 1971, and was a standout running back at Texas A&M University, as well as with the NFL's Atlanta Falcons.
- Tommy Stanley, singer/songwriter, graduated from Kirbyville High School in 2004, and was on NBC's Nashville Star in 2008, placing eighth out of 65,000 people.
- Bhob Stewart. writer, editor, cartoonist, and filmmaker, lived with his family in Kirbyville from 1952 to 1955.
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.
- "US Board on Geographic Names". United States Geological Survey. 2007-10-25. Retrieved 2008-01-31.
- "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.
- Climate of Kirbyville
- The Handbook of Texas Online
- "Annual Estimates of the Resident Population for Incorporated Places: April 1, 2010 to July 1, 2015". Retrieved July 2, 2016.
- "Census of Population and Housing". Census.gov. Retrieved June 4, 2015.