Clarksburg is an unincorporated community located within Millstone Township in Monmouth County, in the U.S. state of New Jersey.

[2] The area is served as United States Postal Service ZIP code 08510.

As of the 2000 United States Census, the population for ZIP Code Tabulation Area 08510 was 2,128.

[4] Clarksburg Methodist Episcopal Church (added in 1999 as Building #99000084) and Clarksburg School (also added in 1999, as Building #99001316) are listed on the National Register of Historic Places.

[5] People who were born in, residents of, or otherwise closely associated with Clarksburg include: