Fort Lee is located north of Edgewater, New Jersey and is on the peninsula between the Hackensack River and the Hudson River. The borough is bisected by the confluence of roads at GWB Plaza leading to the George Washington Bridge, and lies opposite from the Washington Heights neighborhood in uptown Manhattan.

According to the United States Census Bureau, the borough has a total area of 2.9 square miles (7.5 km2), of which, 2.5 square miles (6.6 km2) of it is land and 0.3 square miles (0.9 km2) of it (12.15%) is water.

Fort Lee was formed by an Act of the New Jersey Legislature on March 29, 1904, from the remaining portions of Ridgefield Township. With the creation of Fort Lee, Ridgefield Township became defunct and was dissolved as of March 29, 1904. The Fort Lee Police Department was formed under borough ordinance on August 9, 1904, and originally consisted of six marshals.

Fort Lee is named for General Charles Lee after George Washington and his troops had camped at Mount Constitution overlooking Burdett's Landing, in defense of New York City. It was during Washington's retreat in November 1776 (beginning along a road which is now Main Street) that Thomas Paine composed his pamphlet, "The American Crisis", which began with the recognized phrase, "These are the times that try men's souls". These events are recalled at Monument Park and Fort Lee Historic Park.

In recent years, Fort Lee has seen a surge of residents of Korean origin which has led to the conversion of much of the town into a large Koreatown, similar to Chinatowns of such cities as New York and San Francisco in that many traditional Korean stores and restaurants may be seen in Fort Lee, and the hangul letters of the Korean alphabet are as common as signs in English in parts of the downtown area.

The rapid increase of the Korean population has seen the decline of many other immigrant communities once centered in Fort Lee, notably the Greek and Italian communities, once quite large but now all but extinct. A sizable Russian immigrant community has also sprung up in recent years, also attracted by the urban setting of Fort Lee.

As of the census of 2000, there were 35,461 people, 16,544 households, and 9,396 families residing in the borough. The population density was 14,001.7 people per square mile (5,411.7/km2). There were 17,446 housing units at an average density of 6,888.5/sq mi (2,662.4/km2). The racial makeup of the borough was 62.75% White, 1.73% African American, 0.07% Native American, 31.43% Asian, 0.06% Pacific Islander, 1.69% from other races, and 2.26% from two or more races. Hispanic or Latino of any race were 7.87% of the population.

There were 16,544 households out of which 22.6% had children under the age of 18 living with them, 46.7% were married couples living together, 7.4% had a female householder with no husband present, and 43.2% were non-families. 39.0% of all households were made up of individuals and 15.2% had someone living alone who was 65 years of age or older. The average household size was 2.14 and the average family size was 2.88.

In the borough the population was spread out with 17.5% under the age of 18, 5.1% from 18 to 24, 32.6% from 25 to 44, 24.7% from 45 to 64, and 20.2% who were 65 years of age or older. The median age was 42 years. For every 100 females there were 87.7 males. For every 100 females age 18 and over, there were 85.1 males.

The median income for a household in the borough was $58,161, and the median income for a family was $72,140 (these figures had risen to $67,500 and $83,503 respectively as of a 2007 estimate[19]). Males had a median income of $54,730 versus $41,783 for females. The per capita income for the borough was $37,899. About 5.7% of families and 7.9% of the population were below the poverty line, including 10.9% of those under age 18 and 7.9% of those age 65 or over.

As of the 2000 census, 17.18% of Fort Lee's residents identified themselves as being of Korean ancestry, which was the fifth highest in the United States and third highest of any municipality in New Jersey; behind neighboring Palisades Park (36.38%) and Leonia (17.24%) — for all places with 1,000 or more residents identifying their ancestry. In the same census, 5.56% of Fort Lee's residents identified themselves as being of Chinese ancestry, and 6.09% of Fort Lee's residents identified themselves as being of Japanese ancestry, the highest of any municipality in New Jersey for all places with 1,000 or more residents identifying their ancestry.

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