Hamworthy is a suburb of Poole, in the Bournemouth, Christchurch and Poole district, in the ceremonial county of Dorset, England. It is sited on a peninsula of approximately 3 square kilometres that is bordered by the town of Upton to the north, Poole Harbour to the south, Lytchett Bay to the west and Holes Bay to the east. Poole Bridge, the southern terminus of the A350 road, connects the suburb with the town centre.