Nanaimo is the same of several Canadian federal and British Columbia provincial electoral districts, both historical and current, in and around the Vancouver Island city of Nanaimo, British Columbia, Canada. Ridings "descended" from the original Nanaimo riding are also listed.
Nanaimo riding did not appear in the 1909 election, but Nanaimo City and The Islands were the Nanaimo-area ridings in the 1909 or 1912 election. The riding of Newcastle appeared in the 1916 election, as did The Islands. For the 1924 election parts of Newcastle helped form the new riding of Cowichan-Newcastle.
Nanaimo also did not appear in a riding name in the 1933 or 1937 elections. In 1937 the name The Islands was restored.