The borough borders the Somerset County municipalities of Franklin Township and Montgomery Township.Areas touching Rocky Hill, MapIt. Accessed March 4, 2020.Municipalities, Somerset County, New Jersey. Accessed March 4, 2020.New Jersey Municipal Boundaries, New Jersey Department of Transportation. Accessed November 15, 2019.
the boRough boRderS the SomerSet coUNty mUnIciPalitiEs Of FRanKLIn tOwnshiP and MonTGomerY Township.Areas TOUCHing Rocky HIlL, maPiT. ACcessed maRch 4, 2020.municipaLitIes, SOmErset CouNty, nEw JeRsey. acceSsed mArCH 4, 2020.nEw jersEy MunIcipal boundarIes, neW jErsEY depArTMenT OF transPoRtaTiOn. aCCeSsed nOvEmBER 15, 2019.