Lockport is a city and the county seat of Niagara County, New York, surrounded by the town of Lockport. The population was 21,165 at the 2010 census, with an estimated population of 20,434 as of 2018. It is named from a set of Erie Canal locks (Lock Numbers 34 and 35) within the city. It is part of the Buffalo–Niagara Falls Metropolitan Statistical Area.
According to the United States Census Bureau, the city has a total area of 8.6 square miles (22.4 km²), of which 8.5 square miles (22.1 km²) is land and 0.1 square miles (0.3 km²) (1.39%) is water.
The Erie Canal passes through the center of the city, turning south toward Tonawanda Creek. It climbs the Niagara Escarpment through a series of two modern locks. Originally, a double set of five combined smaller locks were used.
Lockport is at the junction of several major truck roads, including NY Route 78 (Transit Road), NY Route 31, NY Route 77 and NY Route 93. It is 17 miles north of Interstate 90 via NY Route 78 (Transit Rd.).
Lockport lies in the 716 Area Code.
At the 2010 census, there were 21,165 people, 9,153 households and 5,172 families residing in the city. There were 10,092 housing units. The racial makeup of the city was 87.5% White, 7.2% Black or African American, 0.5% Native American, 0.5% Asian, 0.02% Pacific Islander, 0.8% from other races, and 3.5% from two or more races. Hispanic or Latino of any race were 3.2% of the population.
At the 2000 census, there were 9,459 households, of which 30.5% had children under the age of 18 living with them, 41.4% were married couples living together, 13.5% had a female householder with no husband present, and 40.7% were non-families. 34.7% of all households were made up of individuals and 13.3% had someone living alone who was 65 years of age or older. The average household size was 2.33 and the average family size was 3.03.
25.8% of the population were under the age of 18, 8.4% from 18 to 24, 30.6% from 25 to 44, 20.9% from 45 to 64, and 14.3% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 91.7 males. For every 100 females age 18 and over, there were 87.4 males.
The median household income was $35,22, and the median family incomewas $44,614. Males had a median income of $35,197 and females $23,944. The per capita income was $19,620. About 11.7% of families and 13.3% of the population were below the poverty line, including 18.9% of those under age 18 and 7.4% of those age 65 or over.