Holmdel Township is a township in Monmouth County, in the U.S. state of New Jersey. Located near Raritan Bay in the Raritan Valley region, the township is a regional commercial hub of Central Jersey, home to Bell Labs and PNC Bank Arts Center, and a bedroom community of New York City in the New York Metropolitan Area.

Monmouth County is a county, located in the central section of the U.S. state of New Jersey. Comprising much of the northern half of the Jersey Shore, it is bordered to its west by Mercer and Middlesex Counties, to its south by Ocean County, to its east by the Atlantic Ocean, and to its north by the Raritan Bay. Monmouth County's geographic area comprises 30% water. The county is considered part of the Central Jersey region of the state, though it was not among the four counties explicitly listed as included in Central Jersey as part of legislation signed into law in 2023.