Reilly Smith (born April 1, 1991) is a Canadian professional ice hockey player who is a right winger for the Vegas Golden Knights of the National Hockey League (NHL).

Growing up in Toronto, Smith played junior hockey with St. Michael's College School before playing three seasons of NCAA Division I collegiate hockey with the Miami University's RedHawks in the Central Collegiate Hockey Association (CCHA). During his time in college, Smith was drafted in the third round, 69th overall, by the Dallas Stars in the 2009 NHL entry draft. Upon joining the Stars in 2012, he played one full season with the team before being included in a blockbuster trade between Dallas and the Boston Bruins, which sent him, Loui Eriksson, Joe Morrow and Matt Fraser to Boston in exchange for Tyler Seguin, Rich Peverley and Ryan Button. After a short time in Boston, Smith joined the Florida Panthers for two seasons before landing with the Vegas Golden Knights. While with the Knights, he won the Stanley Cup in 2023, scoring the Cup-clinching goal in game five. After stints with the Pittsburgh Penguins and New York Rangers following Vegas' Cup win, Smith was traded back to Vegas in 2025.

Smith was born into an athletic family; he is the younger brother of current Columbus Blue Jackets defenceman Brendan Smith and professional lacrosse player Rory Smith.

Smith was born on April 1, 1991, in Etobicoke, Ontario, Canada to parents Lester and Deirdre Smith. Smith was born into an athletic family; his older brother Brendan Smith plays for the Dallas Stars while his brother Rory competes in the National Lacrosse League (NLL). The three all played minor hockey in the Etobicoke neighbourhood of Mimico with the Faustina Sports Club, then all played for the St. Michael's Buzzers minor juniors.

Growing up, Smith played junior hockey with the Toronto Nationals U16 AAA and St. Michael's College School in Toronto, Ontario. While with St. Michael's, he participated in the CJHL All-Star Game and served as both captain and assistant captain during his career. In his final season with the team, Smith was named their Most Valuable Player after recording 75 points. Prior to entering his freshman season with the Miami University's RedHawks, Smith won a bronze medal at the 2008 World Junior A Challenge and was drafted in the third round, 69th overall, by the Dallas Stars in the 2009 NHL entry draft.

Following the draft, Smith began his freshman season with the Redhawks in the Central Collegiate Hockey Association (CCHA) while majoring in sport studies. Although he admitted to being shocked at the speed of collegiate hockey, Smith recorded eight goals and 20 points in 43 games. During the season, he was also selected to take part in Canada's National Junior Team selection camp.

Upon returning to the RedHawks for his sophomore season, Smith experienced a breakout year and recorded 54 points in 38 games. While playing alongside played alongside seniors Carter Camper and Andy Miele, Smith led the nation's underclassmen in goals and points while also ranking seventh overall in the country for points. As a result of his success during his sophomore year, Smith was named to the All-Florida College Classic Team, voted first team all-CCHA, named to the CCHA all-Tournament Team, College Hockey News Second-Team All-America, and INCH Third-Team All-America.

Smith returned to the RedHawks for his junior year, where he recorded a career-high 30 goals in 39 games. As a result of his success, Smith was named a Hobey Baker Award finalist, First-Team All-America, and finalist for the RBC Financial Group CCHA Player of the Year.