Any candidate who earned an absolute majority of the vote in the primary would be automatically declared the winner of the election.

[1] Nevertheless, the incumbent representatives in all six districts each earned over 50% of the vote in the jungle primaries, so no runoffs occurred.

Results of the 2018 United States House of Representatives elections in Louisiana by district:[2] The 1st district is located in the Greater New Orleans area, covering much of the southeastern area of Louisiana along the Mississippi River Delta, taking in Dulac, Hammond, and Slidell.

The 4th district is located in Northwest Louisiana, taking in the Ark-La-Tex region, including Minden and Shreveport.

The district continues to stretch down into Central Louisiana taking in Alexandria and then expanding eastward into the Florida Parishes.