· a lot of disagreements about nicole ’ s ethnicityhas surfaced, but no one has come to any conclusions. · here, we break down everything to know about michael phelps wife , nicole johnson , including their relationship timeline and their family today. She is not only his wife but also the stoic strength who has stood by his side. She has never explicitly talked about it but people. There are records that have labeled her as persian, hispanic, caucasian, mexican, or black. Keep reading for everything there is to know about nicole johnson. · the mystery of nicole phelps ’ ethnicity and background adds to the intrigue, offering no easy answers. · while a lot is known about her professional career, very little information is available about her personal life, like what her ethnicity is. Michael ’ s wife has maintained a discreet silence about her heritage, leaving room for speculation and theories to run wild. · so, who is michael phelps wife ? · for michael phelps , that individual has always been nicole johnson. Plus, we look back on rare details from michael phelps destination wedding. When johnson was 17, she read an advertisement in the thousand oaks acorn for miss california teenager. Johnson , a student at moorpark college, wanted to transfer to the university of southern california and thought the scholarship would help pay her education.