|Elevation||10 ft (3 m)|
|Area||6.5 km2 (2.5 sq mi)|
|- land||6.5 km2 (2.5 sq mi)|
|- water||0.0 km2 (0 sq mi), 0%|
|Density||935.8 / km2 (2,423.7 / sq mi)|
|- summer (DST)||CDT (UTC-5)|
During the early 19th century, a group of Pennsylvania Dutchmen boarded a sailing vessel in New Orleans and ventured into the Bayou Teche. One of them, Hans Knight, decided to settle his family in what is now Patterson. The community was originally called Dutch Settlement, Dutch Prairie, and Dutch Town.
In 1832, Captain John Patterson, a trader from Indiana, settled there. He built a store and became a prominent citizen. The town was renamed Pattersonville after the captain successfully moved the post office to Dutch Settlement. Pattersonville was incorporated in 1907 as the Town of Patterson.
Patterson is located at .(29.692466, -91.306569)
As of the census of 2000, there were 5,130 people, 1,852 households, and 1,364 families residing in the city. The population density was 2,081.8 people per square mile (805.2/km²). There were 2,061 housing units at an average density of 836.4 per square mile (323.5/km²). The racial makeup of the city was 53.55% White, 43.27% African American, 0.70% Native American, 0.58% Asian, 0.99% from other races, and 0.90% from two or more races. Hispanic or Latino of any race were 1.93% of the population.
There were 1,852 households out of which 38.1% had children under the age of 18 living with them, 51.2% were married couples living together, 17.3% had a female householder with no husband present, and 26.3% were non-families. 22.6% of all households were made up of individuals and 7.4% had someone living alone who was 65 years of age or older. The average household size was 2.75 and the average family size was 3.22.
In the city the population was spread out with 30.9% under the age of 18, 8.3% from 18 to 24, 29.9% from 25 to 44, 20.9% from 45 to 64, and 10.0% who were 65 years of age or older. The median age was 33 years. For every 100 females there were 93.7 males. For every 100 females age 18 and over, there were 91.1 males.
The median income for a household in the city was $23,725, and the median income for a family was $30,000. Males had a median income of $30,618 versus $19,286 for females. The per capita income for the city was $12,038. About 26.4% of families and 30.9% of the population were below the poverty line, including 42.8% of those under age 18 and 17.4% of those age 65 or over.
Schools in Patterson include Hattie A. Watts Elementary School, Patterson Junior High School, and Patterson High School.
Patterson has always been a dominant football team in the state of Louisiana, producing a couple of NFL players and many Division I college players. Though Patterson has only been to the championship twice, it is a traditional playoff team. Currently led by Head Coach Tommy Minton, the team has been more dominant recently. Patterson is also the home of LSU and New Orleans Saints running back Dalton Hilliard (in Saints Hall of Fame) and Tampa Bay Buccaneers wide receiver Ike Hilliard. The term "Who Dat"—commonly associated with the New Orleans Saints—was initiated by a Patterson resident and Lumberjack fan, Lawerence Francis. It originated in the Patterson stadium also known as "The Sugar Dome" as Dalton Hilliard led the Lumberjacks to the Louisiana State Championship game in 1979 where they lost to John Curtis 28-0. The Lumberjacks went to the Louisiana State Championship game on December 10, 2010, but lost to Parkview Baptist 24-20.
On January 15, 2009, Kenny Hilliard was named ESPN RISE Sophomore Player of the Year.
Notable natives and residents 
- Lewis Strong Clarke, a Louisiana sugarcane planter and 19th century Republican politician, operated the plantation Lagonda here.
- Dalton Hilliard, running back for the New Orleans Saints
- Ike Hilliard, wide receiver for the Tampa Bay Buccaneers
- "Geographic Identifiers: 2010 Demographic Profile Data (G001): Patterson city, Louisiana". U.S. Census Bureau, American Factfinder. Retrieved March 29, 2013.
- www.cajuncoast.com "Patterson"
- "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.
- Mark Tennis. "Lattimore, Hilliard earn underclassman player of the year honors". ESPNRISE.com. Retrieved 2009-01-15.
- "Clarke, Lewis Strong". Louisiana Historical Association, A Dictionary of Louisiana Biography (lahistory.com). Retrieved December 21, 2010.