Miss USA 2018 was the 67th Miss USA pageant. It was held on May 21, 2018 at the Hirsch Memorial Coliseum in Shreveport, Louisiana. Nick Lachey and Vanessa Lachey hosted for the first time, while Carson Kressley and Lu Sierra served as commentators and was broadcast on Fox for the third consecutive year. Additionally, it featured performances by 98 Degrees and Lee Brice. Kára McCullough of District of Columbia crowned her successor Sarah Rose Summers of Nebraska at the end of the event, becoming the first woman from her state to win the title. Summers represented the United States at the Miss Universe 2018 pageant on December 17, 2018 in Bangkok, and placed in the Top 20.

Nicholas Scott Lachey is an American singer, dancer, actor, television personality, and host. He rose to fame as the lead singer of the multi-platinum-selling boyband 98 Degrees and later starred in the reality series Newlyweds: Nick and Jessica with his then-wife, Jessica Simpson. He has released four solo albums: SoulO, What's Left of Me, A Father's Lullaby, and Soundtrack of My Life. He also had a recurring role on the television series Charmed. He hosted NBC's The Sing-Off, co-hosted VH1's Big Morning Buzz Live from 2014 to 2015, and Nickelodeon's America's Most Musical Family, and co-hosts the Netflix shows Love Is Blind and The Ultimatum with his wife Vanessa Lachey. He is also the sole host of Perfect Match for Netflix. In 2021, Lachey won the fifth season of The Masked Singer.