Preston-Dartmouth was a provincial electoral district in Nova Scotia, Canada, that elects one member of the Nova Scotia House of Assembly.

[1] It was redistributed prior to the 2021 election into the re-created Preston district, as well as small parts that went to Colchester-Musquodoboit Valley, Eastern Shore and Cole Harbour.

The western part of the district included the area north of Main Street and east of Caledonia Road, until Geovex Court.

The former district of Preston, which took in areas of suburban affluence and rural poverty, was created in 1993 to give black Nova Scotians a better chance of representation in the legislature.

Many people in this riding worked in Metro Halifax in the trade and service sectors.