Milos Raonic (Serbian Cyrillic: Милош Раонић, romanized: Miloš Raonić, pronounced [mǐloʃ râonitɕ]; born December 27, 1990) is a Canadian former professional tennis player. He was ranked as high as world No. 3 in men's singles by the Association of Tennis Professionals, making him the highest-ranked Canadian in ATP history. Raonic won eight ATP Tour titles, and reached a major final at the 2016 Wimbledon Championships.

Raonic first gained widespread recognition by reaching the fourth round of the 2011 Australian Open as a qualifier. Coupled with his first ATP Tour title three weeks later, his world ranking rose from No. 152 to No. 37 in one month, and he was named the 2011 ATP Newcomer of the Year. Raonic was the first player born in the 1990s to be ranked in the top 10 and to qualify for the ATP Finals. His career highlights include his 2016 Wimbledon final, two other major semifinals at the 2014 Wimbledon Championships and 2016 Australian Open, and four Masters finals. He was the first Canadian man in the Open Era to reach the Wimbledon final, the Australian Open semifinals, and the French Open quarterfinals.

Raonic was frequently described as having one of the best serves among his contemporaries. Statistically, Raonic is one of the best servers in the Open Era, winning 91% of service games to rank (third-most of all time). Aided by his serve, he played an all-court style with an emphasis on short points. All his singles titles were won on hardcourts. His overall winning percentage of 68% was one of the highest among players of his era.

Raonic was born on December 27, 1990, in Titograd, SFR Yugoslavia (now Podgorica, Montenegro), and is of Serb ethnic descent. Prompted by the breakup of Yugoslavia and subsequent ethnic conflicts, and seeking more professional opportunities, his family moved to Canada in 1994 when he was three, settling in Brampton, Ontario.

His parents are both engineers; his father, Dušan, holds a Ph.D. in electrical engineering, while his mother, Vesna, has degrees in mechanical and computer engineering, including a master's. He has two older siblings: his sister, Jelena, is eleven years older, while his brother, Momir, is nine years older. Raonic's uncle, Branimir Gvozdenović, is a politician in the Government of Montenegro, where he has served as Deputy Prime Minister. Raonic is fluent in Serbian and English.

His first, brief introduction to tennis came at age six or seven with a week-long tennis camp at the Bramalea Tennis Club in Brampton, followed by weekly hour-long group sessions led by tennis coach Steve Gibson, who recognized his potential. He moved to nearby Thornhill, Ontario soon after, and one or two years passed before he asked his parents if he could play again. His father sought out coach Casey Curtis at the Blackmore Tennis Club in neighbouring Richmond Hill, Ontario. Curtis was at first reluctant to take on Raonic, but was convinced after Raonic demonstrated his commitment by working with his father and a ball machine daily for two months. Years later, Raonic said he chose tennis because of its "individuality and [because he] felt [he] could train more alone and on a ball machine with [his] dad".

Raonic and Curtis worked together "twice a day, almost every day, for the next nine years." Provided that he complete his courses, Raonic was allowed to reduce his hours of attendance at Thornhill Elementary School so that he could practise more, which he did both before and after school. His parents and siblings supported his tennis, taking turns driving him to practice and tournaments, but did not push him to it or interfere with coaching. Rather, they emphasized school throughout, insisting that he maintain academic excellence as a prerequisite to playing tennis. He attended Thornhill Secondary School, and accelerated his course load—achieving an 82 percent average—so that he could graduate a year early. Late in 2007, at the age of 16, Raonic moved to Montreal as one of the first group of players at Tennis Canada's new National Tennis Centre, thus marking the end of his formal relationship with Curtis.

Raonic's four favourite sports teams are FC Barcelona, the Toronto Blue Jays, the Toronto Maple Leafs, and the Toronto Raptors. He played in the 2016 NBA All-Star Celebrity Game held in Toronto.