On 28 May 2018, it was announced that West Ham United Ladies had been granted a WSL licence, promoting the team from the third-tier FA Women's Premier League.

[1] Rosie Kmita and Vyan Sampson were the only players to remain with the club and sign on professional terms following promotion.

[2] Former WSL winner Matt Beard was appointed head coach on 7 June 2018.

[4] The season was also notable as the subject of the BBC behind-the-scenes documentary Britain's Youngest Football Boss.

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