2018 United States Senate election in Mississippi

The 2018 United States Senate election in Mississippi took place on November 6, 2018, in order to elect a member of the United States Senate to represent the state of Mississippi. Incumbent Republican Roger Wicker was re-elected to a second full term, defeating his Democratic challenger, David Baria.

The candidate filing deadline was March 1, 2018, and the primary election was held on June 5, 2018, with a runoff on June 26 if a party's primary fails to produce a majority winner. The race took place on the same day as the nonpartisan jungle primary for the other U.S. Senate seat in Mississippi, which was vacated by Thad Cochran in the spring of 2018.

Declared

 * Roger Wicker, incumbent U.S. Senator
 * Richard Boyanton, businessman

Withdrawn

 * Chris McDaniel, state senator and candidate for the U.S. Senate in 2014    (running for the Class 2 U.S. Senate seat)

Results
[[File:2018MSUSSENGOP.svg|thumb|230px|Results by county Map legend

{{legend|#501616|Wicker—≥90%}}

{{legend|#782121|Wicker—80–90%}}

{{legend|#a02c2c|Wicker—70–80%}}

{{legend|#c83737|Wicker—60–70%}} ]]

Declared

 * David Baria, Mississippi House of Representatives Minority Leader
 * Jensen Bohren
 * Jerone Garland
 * Victor G. Maurice Jr.
 * Omeria Scott, state representative
 * Howard Sherman, businessman and husband of actress Sela Ward

Declined

 * Jeramey Anderson, state representative (running for MS-4)
 * Brandon Presley, chair of the Mississippi Public Service Commission

Results
[[File:Mississippi US Senate Democratic primary, 2018.svg|thumb|230px|Initial primary results by county Map legend

{{legend|#86b6f2|Sherman—50–60%}}

{{legend|#b9d7ff|Sherman—40–50%}}

{{legend|#d3e7ff|Sherman—30–40%}}

{{legend|#b6ffa8|Baria—30–40%}}

{{legend|#afe9af|Baria—40–50%}}

{{legend|#73d873|Baria—50–60%}}

{{legend|#42ca42|Baria—60–70%}}

{{legend|#217821|Baria—80–90%}}

{{legend|#ffccaa|Scott—30–40%}}

{{legend|#ffb380|Scott—40–50%}}

{{legend|#ff9955|Scott—50–60%}}

{{legend|#ff6600|Scott—70–80%}}

{{legend|#d45500|Scott—80–90%}}

{{legend|#e27f90|Garland—50–60%}} ]]

Runoff results
[[File:2018 MS US Senate Democratic runoff.svg|thumb|230px|Primary runoff results by county Map legend

{{legend|#165016|Baria—≥90%}}

{{legend|#217821|Baria—80–90%}}

{{legend|#2ca02c|Baria—70–80%}}

{{legend|#37c837|Baria—60–70%}}

{{legend|#5fd35f|Baria—50–60%}}

{{legend|#5f8dd3|Sherman—50–60%}}

{{legend|#3771c8|Sherman—60–70%}}

{{legend|#2c5aa0|Sherman—70–80%}}

{{legend|#214478|Sherman—80–90%}} ]]

Declared

 * Danny Bedwell, candidate for MS-01 in 2012 and 2014

Declared

 * Shawn O'Hara, perennial candidate

Counties that flipped from Democratic to Republican

 * Copiah (Largest city: Hazlehurst)
 * Panola (Largest city: Batesville)
 * Pike (Largest city: McComb)
 * Yazoo (Largest city: Yazoo City)