Moonachie is a borough in Bergen County, New Jersey, in the Hackensack River watershed. As of the 2010 United States Census, the borough's population was 2,708, reflecting a decline of 46 from the 2,754 counted in the 2000 Census, which had in turn declined by 63 from the 2,817 counted in the 1990 Census.Moonachie was incorporated as a borough by an act of the New Jersey Legislature on April 11, 1910, from portions of Lodi Township, based on the results of a referendum held on May 3, 1910. On March 26, 1917, portions of Moonachie were taken to form Teterboro. Legend is that Moonachie was named after Monaghie, a chief of the Native Americans who inhabited the local cedar forests.The name of the borough is pronounced "moo-NAH-kee" or "MOO-nah-kee;" however, in January 1987, then-Mayor of New York City Ed Koch pronounced it "mah-NOO-chee" when he made his now-famous quip that the New York Giants should hold their victory parade in the borough after the team had just won Super Bowl XXI.