William Holmes (born 20 February 2006) is an Australian cyclist who rides for UCI Continental team Hagens Berman Jayco.

From Adelaide, he competed on the road for ARA-Skip Capital and U19 Academy Région Sud pb Giant for two seasons.

[2] He won the individual time trial stage at Vuelta a Cantabria (UCI 2.1) He broke the junior men's Individual Pursuit national record at the 2024 Australian Track Nationals, finishing in 3:08.181, five seconds faster than the previous record.

Then in August 2024, he won silver in the individual pursuit at the 2024 UCI Junior Track Cycling World Championships and recorded a time of 3:04.161 in qualifying to set a world junior record in Luoyang, China.

[3][4][5] He finished fourth in the Junior men’s time trial at the 2024 UCI Road World Championships in Zurich in September 2024.