Sayreville Junction

Sayreville has a total area of 18.704 square miles (48.442 km2), of which 15.842 square miles (41.030 km2) was land and 2.862 square miles (7.412 km2) was water (15.30%). It is located on a peninsula shared with South Amboy, created by the Raritan River at the north, its tributary South River to the west, and the Raritan Bay to the east. The original village of Sayreville has been known as Sayre's Village, Upper Sayreville, and Sayreville Proper.

Sayreville was originally settled by Europeans in the colonial era and was part the South Amboy Township formed in 1684. It seceded and incorporated as a township on April 6, 1876. The newly formed Township of Sayreville was created out of approximately 14 square miles of south of today's South Amboy consolidating the settlements at Morgan, Melrose, Ernston, and Sayre's Village under one municipal government. The area around the village was then known as Wood's Landing was renamed Sayreville after Sayre and Fisher Brick Company. Fewer than 2,000 people resided in the new township. Several areas take their name from stations along the Raritan River Railroad.