Barack Obama was the big winner in Iowa's Democratic caucus, beating out John Edwards and Hillary Clinton.
On the Republican side, Mike Huckabee was the winner, with Mitt Romney and Fred Thompson placing second and third.
Mississippi's primaries are still more than two months away, but party officials on both sides are already getting ready.
These first few primaries of the election cycle are the most anticipated, and some say, the most crucial for candidates. Officials say they set the tone for the election and create at least the illusion of party front-runners.
Many primaries will take place in the next few months before the Mississippi primary, but local party leaders say Mississippi voters can make a difference in the nomination.
"It may be still a very close race, and if it is, of course, that will be very important to who gets the nomination," said Melba Clark, chair of the Lauderdale County Democrat Party.
"So definitely they have a say, because the candidates have got to get a certain number of votes to be elected nominee for the party," said Lauderdale County Republican Party chair, Sally Brown.
If voters plan to vote in the Mississippi primary on Mar. 11, they will need to register no later than 30 days before the election.
The next big primary is Tuesday in New Hampshire.
Alabama's presidential primary is coming up even sooner than Mississippi's. It is set this year for Feb. 5.
Alabama is one of 21 states that will be voting in that primary. The state moved up its primary in an attempt to make its results more relevant to the selection process.
Voters who are not already registered must do so by Jan. 25 to participate.