The 2018–19 Senior Women's One Day League was the 13th edition of the women's List A cricket competition in India. It was played from December 1 to 31, 2018 in a round-robin format, with 36 teams were divided in 4 groups. Bengal won the tournament, beating Andhra in the final by 10 runs. This was only the second time in 13 editions that Railways did not win the tournament.^[1][2] Himachal Pradesh and Odisha gained promotion from Elite Group C, whilst Uttarakhand gained promotion from the Plate Group.^[3]

The tournament's scheduling conflict with Ranji Trophy led to a shortage of umpire and match officials. The knockouts for the competition were therefore delayed and moved from December 24–29 to December 26–31.^[4]

The 36 teams competing in the tournament were divided into the Elite Group and the Plate Group, with the 27 teams in the Elite Group further divided into Groups A, B and C and the 10 remained teams competing in one Plate Group. The tournament operated on a round-robin format, with each team playing every other team in their group once. At the end of the group stage, the Elite Group A and Elite Group B tables were combined, with the top five in the combined table progressing to the quarter-finals, joined by the top two teams from Elite Group C and the top team from the Plate Group. The top two teams from Elite Group C were also promoted to Elite Group A/B for the following season, with the bottom two teams from the combined table relegated. The winner of the Plate Group was also promoted, with the bottom team from Elite Group C relegated. Matches were played using a 50 over format.

The groups worked on a points system with positions with the groups being based on the total points. Points were awarded as follows:^[5]

Win: 4 points.
Tie: 2 points.
Loss: 0 points.
No Result/Abandoned: 2 points.

If points in the final table are equal, teams are separated by most wins, then head-to-head record, then Net Run Rate.