The Milltown India Rubber Company is a historic building located at 40 Washington Avenue in the borough of Milltown in Middlesex County, New Jersey. Construction of the building started in 1899 and was completed in 1900. Designed by architect George Parsell with vernacular Italianate style, it was part of the rubber industry in the county. The building was added to the National Register of Historic Places on February 13, 1986 for its significance in architecture and industry.