Nanaimo is a former provincial electoral district for the Legislative Assembly of British Columbia, Canada, in use until 2024.

For the 1979 election, the riding shifted southwards, running from Lantzville in the north to Ladysmith in the south.

The northern part of the riding, including the northern coast of the City of Nanaimo was transferred to Parksville-Qualicum, while the southern boundary was moved up to the southern limit of the Nanaimo Regional District, except for Valdes Island, which was added back to the riding.

In 2009, the riding was drastically reduced in size, consisting solely of part of the city of Nanaimo.

Under the 2021 British Columbia electoral redistribution that took effect upon the calling of the 2024 election, the riding was eliminated by being divided north-south between Nanaimo-Lantzville and Nanaimo-Gabriola Island.