Sayreville was originally incorporated as a township on April 6, 1876, from portions of South Amboy Township.

It was incorporated in 2009 from portions of the Town of Bristol.

On March 8, 1805, Harrison was set off and incorporated from portions of Otisfield and Bridgton.

Glendale was incorporated on December 28, 1950 from portions of the Town of Milwaukee.

It was incorporated in April 1805 from portions of Penn & Beaver Townships.

Garfield was originally incorporated as a borough on March 15, 1898, from portions of Saddle River Township and Wallington.

Irvington was incorporated as an independent village on March 27, 1874, from portions of Clinton Township.

It was incorporated on August 25, 1993, from portions of Bear Creek Township.

Berlin was incorporated as a township on April 11, 1910, from portions of Waterford Township.

Searsport was settled in the 1670s and incorporated on February 13, 1845 from portions of Prospect and Belfast.