Whittingham, also known as Greenbriar at Whittingham, is an unincorporated community and census-designated place (CDP) in Monroe Township, Middlesex County, New Jersey, United States.

Whittingham is in southern Middlesex County, in west-central Monroe Township.

[1] The community sits on a local drainage divide, with the southern part draining toward Cranbury Brook, a tributary of the Millstone River, and the northern part draining toward Manalapan Brook, a tributary of the South River.

The 2010 United States census counted 2,476 people, 1,416 households, and 862 families in the CDP.

Of all households, 35.7% were made up of individuals and 33.1% had someone living alone who was 65 years of age or older.

[11] As of the 2000 United States Census[5] there were 2,483 people, 1,339 households, and 1,033 families living in the CDP.

20.5% of all households were made up of individuals, and 16.9% had someone living alone who was 65 years of age or older.