|• Total||13.5 sq mi (34.8 km2)|
|• Land||13.3 sq mi (34.5 km2)|
|• Water||0.1 sq mi (0.3 km2)|
|Elevation||23 ft (7 m)|
|• Density||153.1/sq mi (59.1/km2)|
|Time zone||Central (CST) (UTC-6)|
|• Summer (DST)||CDT (UTC-5)|
|GNIS feature ID||0672123|
Kiln is located at  and is referred to locally as "the Kiln", with the "n" silent.(30.412874, -89.435417)
According to the United States Census Bureau, the CDP has a total area of 13.5 square miles (35 km2), of which 13.3 square miles (34 km2) is land and 0.1 square miles (0.26 km2) (0.97%) is water.
Mississippi Highway 43, also designated County Road 603, is the main road through the Kiln, connecting to Interstate 10 to the South. Highway 43 splits from County Road 603 at the North end of the Kiln. Highway 43 connects to Interstate 59 at Picayune and County Road 603 connects to Mississippi Highway 53 at Necaise
Kiln takes its name from the many kilns once found in the area that served the timber industry. During the boom years, Kiln was home to many timber mills, a hotel, and a hospital. The Jordan River Lumber Company was one of the major local employers.
"The Jordan River Lumber Company was incorporated in South Dakota in January 1913, and domiciled at Kiln, Hancock County, MS. In January 1913, the company purchased the mill of W. W. Carre Company, Ltd., at Kiln, on the Jourdon River. The original mill burned and was replaced in 1914 with a new mill with a cutting capacity of 150,000 feet (46,000 m) per day. In 1922, the mills in Kiln and Lumberton were consolidated at Barth, MS, the division point on the Mississippi Southern. In February 1930, the mill cut out and was dismantled." 
A few older structures remain, including Annunciation Catholic Church and the original post office (later Curet's Grocery), which has since been turned into a lawnmower repair shop.
As of the census of 2010, there were 2,238 people, 847 households, and 597 families residing in the CDP. There were 987 housing units. The racial makeup of the CDP was 92.7% White, 3.40% African American, 0.6% Native American, 0.2% Asian, and 2.4% from two or more races. Hispanic or Latino of any race were 3.7% of the population.
There were 847 households out of which 27.4% had children under the age of 18 living with them, 50.3% were married couples living together, 14.5% had a female householder with no husband present, and 29.5% were non-families. 21.6% of all households were made up of individuals and 6.8% 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 3.03.
In the CDP the population was spread out with 26.8% under the age of 20, 28.7% from 20 to 44, 30.7% from 45 to 64, and 13.8% who were 65 years of age or older. The median age was 42.3 years. For every 100 females there were 103.8 males. For every 100 females age 20 and over, there were 99.6 males.
Of the 1,105 individuals over 24 years old, 29.59% completed less than high school, 26.70% completed high school, 36.56 completed some college or an Associate degrees, 4.71% completed a Bachelor Degree, and 2.44% completed a graduate degree.
Kiln is served by the Hancock County School District.
- Kiln is known as the hometown of NFL quarterback Brett Favre; he attended Hancock North Central High School in Kiln.
- "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.
- Anglo American Lightning Organisation, returning to flight XS422, the former ETPS Lightning at Stennis Airport, Kiln, Mississippi
- Lazy Magnolia Microbrewery