The Manitoba general election of September 21, 1999 was held to elect members to the Legislative Assembly of Manitoba, Canada. The New Democratic Party won the election. They won 32 out of 57 seats. The Progressive Conservative Party won 24 seats. The Manitoba Liberal Party won one seat. The Manitoba Party, the Green Party, the Libertarian Party, and the Communist Party all ran candidates as well, but none won any seats. Each of those parties got less than 1% of the total vote.