Tangipahoa Parish ( /ˌtændʒɪpəˈhoʊə/; French: Paroisse de Tangipahoa) is a parish located in the southeast of the U.S. state of Louisiana. As of the 2010 census, the population was 121,097. The parish seat is Amite City, while the largest city is Hammond. Southeastern Louisiana University is located in Hammond. Lake Pontchartrain borders the southeast side of the parish.
According to the U.S. Census Bureau, the parish has a total area of 823 square miles (2,130 km), of which 791 square miles (2,050 km) is land and 32 square miles (83 km) (3.9%) is water. Lake Pontchartrain lies on the southeast side of the parish.
Most of the parish south of Ponchatoula consists of Holocene coastal swamp and marsh—gray-to-black clays of high organic content and thick peat beds underlying freshwater marsh and swamp.
As of the census of 2000, there were 100,588 people, 36,558 households, and 25,773 families residing in the parish. The population density was 127 people per square mile (49/km²). There were 40,794 housing units at an average density of 52 per square mile (20/km²). The racial makeup of the parish was 69.76% White, 28.35% Black or African American, 0.39% Asian, 0.24% Native American, 0.01% Pacific Islander, 0.46% from other races, and 0.78% from two or more races. 1.53% of the population were Hispanic or Latino of any race.
There were 36,558 households out of which 35.30% had children under the age of 18 living with them, 49.90% were married couples living together, 16.20% had a female householder with no husband present, and 29.50% were non-families. 24.00% of all households were made up of individuals and 8.40% had someone living alone who was 65 years of age or older. The average household size was 2.66 and the average family size was 3.19.
In the parish the population was spread out with 27.70% under the age of 18, 12.70% from 18 to 24, 27.70% from 25 to 44, 21.20% from 45 to 64, and 10.60% who were 65 years of age or older. The median age was 32 years. For every 100 females there were 93.00 males. For every 100 females age 18 and over, there were 88.60 males.
The median income for a household in the parish was $29,412, and the median income for a family was $36,731. Males had a median income of $31,576 versus $20,066 for females. The per capita income for the parish was $14,461. About 18.00% of families and 22.70% of the population were below the poverty line, including 28.60% of those under age 18 and 20.10% of those age 65 or over.