Winners of all previous ANA Inspirations Donna Andrews, Juli Inkster, Lydia Ko (4,5,6,7,8,9), Stacy Lewis (3,5,8,9), Brittany Lincicome (5,8), Inbee Park (3,5,6,8,9), Morgan Pressel (8), Ryu So-yeon (5,6,7,8,9), Lexi Thompson (5,6,8,9), Yani Tseng, Yoo Sun-young (8) 3.

Winners of official LPGA Tour tournaments from the 2015 ANA Inspiration through the week immediately preceding the 2018 ANA Inspiration Choi Na-yeon, Carlota Ciganda (7,8,9,10-LET), Shanshan Feng (7,8,9), Charley Hull (6,8,9), Jang Ha-na (8,9), Ji Eun-hee (8), Cristie Kerr (6,8,9), Kim Sei-young (7,8,9), Katherine Kirk (7,8), Ko Jin-young (9), Jessica Korda (6,8,9), Mirim Lee (6,8,9), Minjee Lee (6,8,9), Lee Mi-hyang (7,8), Caroline Masson (7,8), Haru Nomura (8), Jenny Shin (8), Kris Tamulis, Amy Yang (6,7,8,9) Ahn Sun-ju – did not play 6.

Top-80 on the previous year's season-ending LPGA Tour official money list Marina Alex, Nicole Broch Larsen, Ashleigh Buhai, Pei-Yun Chien, Cydney Clanton, Jacqui Concolino, Sandra Gal, Jaye Marie Green, Wei-Ling Hsu, Tiffany Joh, Kim Kaufman, Megan Khang, Nelly Korda, Olafia Kristinsdottir, Candie Kung, Lee Jeong-eun, Pernilla Lindberg, Gaby López, Ally McDonald, Azahara Muñoz, Su-Hyun Oh, Ryann O'Toole, Jane Park, Pornanong Phatlum, Beatriz Recari, Madelene Sagström, Lizette Salas (9), Alena Sharp, Sarah Jane Smith, Jennifer Song, Angela Stanford, Ayako Uehara, Jing Yan, Angel Yin Laura Gonzalez Escallon, Gerina Piller – did not play 9.

Top-20 players plus ties on the current year LPGA Tour official money list at the end of the last official tournament prior to the current ANA Inspiration, not otherwise qualified above, provided such players are within the top-80 positions on the current year LPGA Tour official money list at the beginning of the tournament competition Aditi Ashok, Laetitia Beck, Laura Davies, Hannah Green, Nasa Hataoka, Caroline Inglis, Cindy LaCrosse, Bronte Law, Erynee Lee, Nanna Koerstz Madsen, Amy Olson, Park Hee-young, Mariah Stackhouse, Emma Talley, Mariajo Uribe, Lindsey Weaver 12.

Up to six sponsor invitations for top-ranked amateur players María Fassi (a), Lucy Li (a), Atthaya Thitikul (a), Albane Valenzuela (a), Lilia Vu (a), Rose Zhang Unknown category Paula Creamer, Catriona Matthew, Florentyna Parker, Emily Kristine Pedersen, Melissa Reid Thursday, March 29, 2018 Friday, March 30, 2018 Saturday, March 31, 2018 Sunday, April 1, 2018 Final round Cumulative tournament scores, relative to par Sunday, April 1, 2018 Monday, April 2, 2018 Pernilla Lindberg, Inbee Park, and Jennifer Song were tied after 72 holes at 273 (−15).