The season covered the period from 1 July 2017 to 30 June 2018.

Marco Silva replaced Walter Mazzarri despite resigning as the manager at Hull City who were relegated last season, but after just 26 games in charge, he was sacked and was immediately replaced by Javi Gracia.

[2] Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

[37] Watford entered the competition in the third round and were handed a home tie against Bristol City.

[38] Watford entered the EFL Cup in the second round and were drawn at home to Bristol City.