U.S. Route 9 crosses the eastern part of the community, leading north 6 miles (10 km) to South Amboy and south 10 miles (16 km) to Freehold.

New Jersey Route 18 passes through the western side of Old Bridge, leading northwest 9 miles (14 km) to New Brunswick, the Middlesex county seat, and southeast 19 miles (31 km) to the Garden State Parkway in Tinton Falls.

[3] The CDP is bordered to the west by Duhernal Lake and the South River, and the entire community drains westward to the river, mainly via Iresick Brook (in the western part of the CDP) and Deep Run (running through the center).

The 2010 United States census counted 23,753 people, 7,775 households, and 6,368 families in the CDP.

Of all households, 15.3% were made up of individuals and 8.2% had someone living alone who was 65 years of age or older.

[15] As of the 2000 United States Census[7] there were 22,833 people, 7,274 households, and 6,233 families living in the CDP.

12.0% of all households were made up of individuals, and 5.1% had someone living alone who was 65 years of age or older.

About 2.0% of families and 2.9% of the population were below the poverty line, including 3.6% of those under the age of 18 and 6.5% of those 65 and older.