Iowa US Congressional Districts‣US SenateIA-SENIA-SENballotpedia.orgen.wikipedia.orgChuck GrassleyRepublican PartyIA-SENIA-SENballotpedia.orgen.wikipedia.orgJoni ErnstRepublican Party‣US HouseIowa 1stIowa 1st5712,048.84Southeast: Davenport, Iowa Citymillermeeks.house.govballotpedia.orgen.wikipedia.orgR+4Mariannette Miller-MeeksRepublican PartyIowa 2ndIowa 2nd5512,261.92Northeast: Cedar Rapids, Dubuquehinson.house.govballotpedia.orgen.wikipedia.orgR+4Ashley HinsonRepublican PartyIowa 3rdIowa 3rd818,789.62South central: Des Moines, Ottumwanunn.house.govballotpedia.orgen.wikipedia.orgR+2Zach NunnRepublican PartyIowa 4thIowa 4th3222,756.75West: Sioux City, Council Bluffs, Amesfeenstra.house.govballotpedia.orgen.wikipedia.orgR+15Randy FeenstraRepublican Party