Madeleine Bordallo Democratic Michael San Nicolas Democratic The 2018 United States House of Representatives election in Guam was held on Tuesday, November 6, 2018, to elect the non-voting Delegate to the United States House of Representatives from Guam's at-large congressional district.

The non-voting delegate is elected for a two-year term.

Incumbent Democratic Delegate Madeleine Bordallo, who had represented the district since 2003, lost her primary election to Michael San Nicolas, a senator of the Guam Legislature since 2013.

San Nicolas was challenged by Republican former public auditor Doris Flores-Brooks for Guam's lone-seat in the United States House of Representatives.

Democratic candidate Michael San Nicolas attained the higher number of votes and took office in January 2019 as Guam's congressional delegate.