Daniel "Sonny" Dykes (born November 9, 1969) is an American football coach, and a former college baseball player. He is currently the head football coach at Texas Christian University (TCU), and previously served in the same role at Southern Methodist University (SMU) from 2018 to 2021, the University of California, Berkeley from 2013 to 2016, and Louisiana Tech University from 2010 to 2012. In his first season at TCU, he led the Horned Frogs to a win in the semifinal and an appearance in the National Championship game.

Dykes, the youngest son of former Texas Tech head coach Spike Dykes, began his career as a high school baseball and football coach in Texas. He then moved to the junior college level as an assistant football coach, including stints with Kentucky, Texas Tech, and Arizona. In 2010, Dykes became a head college football coach for the first time at Louisiana Tech. After a 5–7 record in his first season, Dykes led Louisiana Tech to an 8–5 record in 2011 with a Western Athletic Conference title and followed that with a 9–3 record in 2012. As of 2022, this remains the only conference championship Dykes has won across four head coach jobs. Dykes then became head coach at California in 2013.

After coaching Cal football to its worst season (1–11) in program history in 2013, Dykes improved the team's record to 5–7 in 2014, and then to 8–5 and an Armed Forces Bowl victory in 2015. He finished the 2016 season with 5–7 record, his third losing season in four years at California, and was fired after the season. In 2017, Dykes was hired as head coach at Southern Methodist University. Dykes coached the Mustangs to three winning seasons, including a 10–3 record in 2019 which was the program's best record in more than thirty years. Following his success at Southern Methodist, Dykes was hired as the head coach at Texas Christian University prior to the 2022 season. In his first season at TCU, Dykes led the Horned Frogs to a 12–1 record and the team's first ever College Football Playoff appearance. On December 31, 2022, he led the Horned Frogs to their first-ever CFP win in program history.

Sonny Dykes graduated from Coronado High School in Lubbock, Texas, where he played both football and baseball. He lettered for three years as a first baseman for the Texas Tech baseball team. Dykes earned a bachelor's degree in history from Texas Tech University in 1993 and a master's degree from the University of Kentucky in 1999.

Dykes began his career in the spring of 1994 as an assistant baseball coach at Monahans High School in Monahans, Texas. Later in 1994, Dykes switched to coaching football as the running backs coach for J. J. Pearce High School in Richardson, Texas.

From 1995 to 1996, Dykes coached at Navarro College in Corsicana, Texas. In 1995, he coached the running backs as Navarro posted an 8–2 record. In 1996, he served as the quarterbacks and receivers coach and the passing game coordinator as Navarro finished 7–4 while reaching the Texas junior college championship game. At Navarro, Dykes coached Leroy Fields, who led the nation in receiving and was selected in the seventh-round of the 2000 NFL draft by the Denver Broncos.

In 1998, Dykes served as the wide receivers coach at Northeast Louisiana. Under Dykes' guidance, wide receiver Marty Booker broke all of NLU's single-season and career receiving records and was named first-team All-Independent. Booker played in the Blue-Gray and East-West Shrine all-star games and was selected by the Chicago Bears in the third-round of the 1999 NFL draft.

In 1997, Dykes served as a graduate assistant and tight ends coach at Kentucky under head coach Hal Mumme.