Mississippi elects all its state officers in November 2019. Here is the list of candidates. The filing deadline is the same for everyone, except for president, but of course the 2019 election has nothing to do with presidential elections. The filing deadline this year was March 1, 2019.
There are no Reform Party nominees. This is surely because the leader of the Mississippi Reform Party, Shawn O’Hara, died last year, and he was the party’s candidate recruiter.
The Constitution Party is running Bob Hickingbottom for Governor. The Libertarian Party has two legislative candidates. No other third parties have any candidates. There are many independent candidates for the legislature, and one independent is running for Governor.