Harrison is a town

Town (New Jersey)

A Town in the context of New Jersey local government refers to one of five types and one of eleven forms of municipal government...

 in Hudson County, New Jersey

Hudson County, New Jersey

Hudson County is the smallest county in New Jersey and one of the most densely populated in United States. It takes its name from the Hudson River, which creates part of its eastern border. Part of the New York metropolitan area, its county seat and largest city is Jersey City.- Municipalities...

, United States. As of the 2010 United States Census, the town's population was 13,620. The town is a suburb of the nearby city of Newark, New Jersey

Newark, New Jersey

Newark is the largest city in the American state of New Jersey, and the seat of Essex County. As of the 2010 United States Census, Newark had a population of 277,140, maintaining its status as the largest municipality in New Jersey. It is the 68th largest city in the U.S...

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Harrison is located at 40.745951°N 74.155096°W (40.745951, -74.155096).

According to the United States Census Bureau

United States Census Bureau

The United States Census Bureau is the government agency that is responsible for the United States Census. It also gathers other national demographic and economic data...

, the town has a total area of 1.3 square miles (3.4 km²), of which, 1.2 square miles (3.1 km²) of it is land and 0.1 square mile (0.258998811 km²) of it (6.82%) is water.
As of the census

Census

A census is the procedure of systematically acquiring and recording information about the members of a given population. It is a regularly occurring and official count of a particular population. The term is used mostly in connection with national population and housing censuses; other common...

of 2000, there were 14,424 people, 5,136 households, and 3,636 families residing in the town.