Kyle Raymond Orton (born November 14, 1982) is an American former professional football player who was a quarterback in the National Football League (NFL). He played college football for Purdue, where he started four straight bowl games. He was selected by the Chicago Bears in the fourth round of the 2005 NFL draft. After an injury to Bears starter Rex Grossman, Orton was pressed into service as the starting quarterback during his rookie year, starting the first 14 games of the 2005 season, but was replaced by Grossman for the playoffs that year. Orton did not play at all in 2006, and sparingly in 2007. He regained his starting job from Grossman in 2008, but the team finished a disappointing 9–7 and out of the playoffs. In the offseason of that year, he was traded to the Denver Broncos.

Orton spent the next three seasons with Broncos, where he amassed a 12–21 record as a starting quarterback over three seasons. He lost his starting role to Tim Tebow during the 2011 season and was released by the team. Orton was claimed off waivers by the Kansas City Chiefs. He spent the next three seasons as a back-up quarterback for the Dallas Cowboys and Buffalo Bills. Orton became the Bills' starting quarterback in 2014, where he went 7–5. He retired after the season.

Orton attended Southeast Polk High School in Pleasant Hill, Iowa, where he was a four-sport star in football, basketball, tennis, and track & field.

At the end of his high school career, Orton was the No. 2 ranked quarterback in the nation by SuperPrep and No. 7 by Rivals.com. His career passing statistics were 208 for 450 (46.2%), 3,176 yards with 24 touchdowns, and 18 interceptions. He earned honorable mention all-state and first-team all-conference his senior year, after completing 95 of 192 attempts (49.5%), 1,366 yards with 12 touchdowns, and 5 interceptions.

Orton wore uniform No. 18 in honor of former Nebraska quarterback Brook Berringer, who died in a plane crash in 1996.

Orton committed to Purdue, but considered attending Colorado before ultimately deciding on the former. Orton started in the 2001, 2002 and 2004 Sun Bowl, and the 2003 Capital One Bowl. He is the only Purdue quarterback to start four consecutive bowl games (Drew Brees and Mark Herrmann started three straight). During his undergraduate years at Purdue, Orton was a member of the Pi Kappa Alpha fraternity.

In 2004, Orton was the preseason third-team All-American quarterback, behind USC's Matt Leinart and Oklahoma's Jason White as well as a Heisman Trophy hopeful early in the season. After starting the season 5–0 the Boilermakers lost 4 straight close games. During that stretch Orton suffered injuries against Michigan and Northwestern. Brandon Kirsch took over for Orton in the 3rd quarter against Northwestern and Orton subsequently missed the game the following week against Iowa. Orton was able to return to the field in the 4th quarter against Ohio State to help the Boilermakers get the go ahead TD to overcome the Buckeyes and snap their losing streak. The following week the Boilermaker's defeated their rival, Indiana Hoosiers, 63–24. During that game Orton tied former Purdue quarterback Drew Brees' record for number of passing yards in a game (522). That record stood until 2018 when David Blough threw for 572 yards in a game against University of Missouri.

Orton makes a cameo in NCAA Football 2006, where he says, "EA Sports, it's in the game", along with Derek Anderson in the game's introduction.