Nicholas James Christopher Lowther, 2nd Viscount Ullswater LVO, PC (born 9 January 1942), is a British hereditary peer and former member of the House of Lords who sat as a Conservative. He succeeded his great-grandfather in the viscountcy of Ullswater in 1949, being one of very few peers to have succeeded a great-grandfather in a title.
He served as a whip and a minister under Margaret Thatcher and John Major between 1989 and 1995 culminating in serving as the Minister of State for Housing from 1994 to 1995.