Romsey is a town in the local government area of the Shire of Macedon Ranges in the state of Victoria, Australia. The town is 61 kilometres (38 mi) north of Melbourne. As of the 2021 Census, Romsey had a population of 4,934.

The Lancefield railway line, or the Clarkefield and Lancefield Railway, was a former broad gauge railway in central Victoria, connecting Clarkefield railway station on the Bendigo line to Kilmore railway station on the Heathcote line, via Lancefield. However, the ill-fated Lancefield-Kilmore section operated only briefly in the 1890s so, for much of its history, the line existed simply as a branch line, with its terminus at Lancefield station.