Michael Mmoh (/moʊ/ MOH; born January 10, 1998) is an American professional tennis player. Mmoh has a career-high ATP singles ranking of No. 81 achieved on September 11, 2023 and a doubles ranking of No. 265 achieved on April 12, 2021. He won the USTA junior national championship in 2016.

Born in Saudi Arabia, where he lived until the age of 13, Mmoh has both Irish and Nigerian ancestry. Michael's father Tony Mmoh was also a professional tennis player who represented Nigeria and reached a career-high ranking of No.105. His mother was born in Ireland and is also an Australian citizen. Mmoh's parents named him after basketball superstar Michael Jordan.

Mmoh began playing tennis at age 3. He trains at the IMG Academy in Florida.

Mmoh married his girlfriend, Croatian tennis player and IMG Academy tennis instructor Klara Mrcela on September 9, 2024. The couple had been engaged two years prior in December of 2022.

Mmoh peaked in the junior rankings at No. 2 after reaching the semifinals at the 2015 Junior French Open, where he lost to eventual champion Tommy Paul. He won the 2016 USTA 18s Boys' National Championship to earn a wild card into the main draw of the US Open.

Mmoh enjoyed early success on the ITF Futures tour, winning three titles before turning 18.

In February 2016, Mmoh qualified for his first ATP-level tournament at Memphis by defeating fellow Americans Dennis Novikov and Bjorn Fratangelo. He then lost in the first round to eventual finalist Taylor Fritz, the highest ranked American teenager at the time. Following his fourth Futures title, Mmoh was awarded a wildcard into the Miami Masters, where he lost to Alexander Zverev, the top-ranked 18 year-old in the world, after dropping two tiebreaks.

In September 2016, Mmoh broke into the top 300 for the first time by reaching the final of the ATP Challenger event at Tiburon as a qualifier.