|Elevation||226 ft (68.9 m)|
|Area||3.3 sq mi (8.5 km2)|
|- land||3.3 sq mi (9 km2)|
|- water||0.0 sq mi (0 km2), 0%|
|Density||252.5 / sq mi (97.5 / km2)|
|- summer (DST)||CDT (UTC-5)|
Under a cost-saving realignment plan, the Webster Parish School Board closed Union Elementary School in Doyline in 2011. Doyline High School absorbed the elementary pupils. Vandals broke windows in the abandoned structure, which contained asbestos and black mold. The razing, which will cost $99,000, began in January 2015.
Doyline is an entry point to Lake Bistineau and the Lake Bistineau State Park. The lake itself, popular for fishing, is the reservoir of Dorcheat Bayou, a 122-mile stream that begins in Nevada County, Arkansas.
On August 24, 2006, an explosion of the Explo Systems, Inc., site at Camp Minden led to the evacuation of six hundred pupils nearby but caused no injuries or fatalities. The site is a former U.S. Army ammunition plant where military bombs were disassembled and recycled.
In December 2012 police began the removal of 2,700 tons of explosives from Camp Minden, located at the site of the former Louisiana Army Ammunition Plant, leading to evacuations from nearby Doyline.
Doyline is located at (32.531282, -93.410145).
According to the United States Census Bureau, the village has a total area of 3.3 square miles (8.5 km2), all land.
As of the census of 2000, there were 841 people, 325 households, and 235 families residing in the village. The population density was 252.5 inhabitants per square mile (97.5/km²). There were 359 housing units at an average density of 107.8 per square mile (41.6/km²). The racial makeup of the village was 79.90% White, 17.12% African American, 0.12% Asian, 0.12% from other races, and 2.73% from two or more races. Hispanic or Latino of any race were 0.71% of the population.
There were 325 households out of which 32.6% had children under the age of 18 living with them, 53.8% were married couples living together, 15.7% had a female householder with no husband present, and 27.4% were non-families. 25.5% of all households were made up of individuals and 12.0% had someone living alone who was 65 years of age or older. The average household size was 2.59 and the average family size was 3.08.
In the village the population was spread out with 26.0% under the age of 18, 12.1% from 18 to 24, 25.8% from 25 to 44, 23.4% from 45 to 64, and 12.6% who were 65 years of age or older. The median age was 35 years. For every 100 females there were 93.8 males. For every 100 females age 18 and over, there were 88.5 males.
The median income for a household in the village was $34,063, and the median income for a family was $36,875. Males had a median income of $30,536 versus $21,563 for females. The per capita income for the village was $16,218. About 12.4% of families and 18.9% of the population were below the poverty line, including 34.7% of those under age 18 and 15.1% of those age 65 or over.
- James E. Bolin (1914–2002), a district and circuit judge and a former member of the Louisiana House of Representatives, was born in Doyline.
- Jesse L. Boucher (1912–2004), real estate developer and former mayor of Springhill, taught at Doyline High School in the latter 1930s.
- John Ardis Cawthon (1907–1984), education professor and regional historian at Louisiana Tech University was reared in Doyline.
- Tommy Joe Eagles (1949-1994), college basketball coach, graduated in 1967 from Doyline High School.
- Harold Montgomery (1911–1995), lived in Doyline, and was a businessman and conservative state senator from 1960–1968 and 1972–1976.
- Jimmy G. Tharpe (1930–2008), founder of Louisiana Baptist University in Shreveport, pastored during the early 1950s at the Trinity Baptist Church, then a Missionary Baptist congregation in Doyline but since Independent Baptist.
- C.W. Thompson of Doyline was a former president of the Webster Parish School Board who was elected without opposition to succeed James Bolin in the Louisiana House from 1944 until his death in office in 1951. Mrs. Lizzie P. Thompson filled her husband's seat from 1951–1952, when it was won by E.D. Gleason of Shongaloo in central Webster Parish.
- Michelle Bates (January 9, 2015). "Demoltion of Doyline’s Union Elementary underway". Minden Press-Herald. Retrieved January 10, 2015.
- "True Blood filming locations". Internet Movie Data Base. Retrieved January 9, 2015.
- "Tons of explosives found in US town". 3 News NZ. December 4, 2012.
- "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.
- "Annual Estimates of the Resident Population for Incorporated Places: April 1, 2010 to July 1, 2014". Retrieved June 4, 2015.
- "Census of Population and Housing". Census.gov. Retrieved June 4, 2015.
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.