María José Portillo Ramírez
María José Portillo Ramírez is a Mexican tennis player.
She has a career high WTA singles ranking of 808, achieved on 28 May 2018. She also has a career high WTA doubles ranking of 441, set on 18 June 2018. Portillo Ramírez has won one ITF singles titles and seven ITF doubles titles.
She has represented Mexico at the Fed Cup, where she has a win-loss record of 2–0.
ITF Circuit finals
Singles: 3 (2 titles, 1 runner–ups)
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Win | 1–0 | May 2018 | ITF Tacarigua, Trinidad and Tobago | 15,000 | Hard |  Andrea Renée Villarreal | 6–2, 6–2 |
| Loss | 1–1 | May 2019 | ITF Cancún, Mexico | 15,000 | Hard | Marcela Zacarías | 3–6, 1–6 |
| Win | 2–1 | Nov 2019 | ITF Cancún, Mexico | 15,000 | Hard |  Tiphanie Fiquet | 6–7, 7–5, 6–2 |
Doubles (9–3)
| Outcome | No. | Date | Category | Tournament | Surface | Partner | Opponents | Score |
| Winner | 1. | 6 November 2017 | $15,000 | Cúcuta, Colombia | Clay |  Emily Appleton |  Sofía Munera Sánchez  Noelia Zeballos | 6–3, 7–6 |
| Winner | 2. | 27 November 2017 | $15,000 | Manta, Ecuador | Hard |  Sofia Sewing | Emily Appleton María Herazo González | 6–1, 6–3 |
| Winner | 3. | 4 December 2017 | $15,000 | Guayaquil, Ecuador | Clay | Sofia Sewing | Stephanie Nemtsova  Dominique Schaefer | 7–5, 6–2 |
| Runner-up | 1. | 10 April 2018 | $25,000 | Pelham, United States | Clay | Maria Mateas |  Alexa Guarachi  Erin Routliffe | 1–6, 2–6 |
| Winner | 4. | 7 May 2018 | $15,000 | Tacarigua, Trinidad and Tobago | Hard | Emily Appleton |  Kerrie Cartwright Kariann Pierre-Louis | 6–4, 6–3 |
| Runner-up | 2. | 13 November 2018 | $25,000 | Norman, United States | Hard | Sofia Sewing |  Vladica Babić Ena Shibahara | 2–6, 3–6 |
| Winner | 5. | 12 March 2019 | $15,000 | Cancún, Mexico | Hard | Emily Appleton | Dasha Ivanova  Alexandra Perper | 7–6, 6–4 |
| Runner-up | 3. | 9 April 2019 | $15,000 | Cancún, Mexico | Hard | Emily Appleton |  Natsumi Kawaguchi  Maya Tahan | 1–6, 2–6 |
| Winner | 6. | 7 May 2019 | $15,000 | Cancún, Mexico | Hard | Marcela Zacarias |  Eduarda Piai  Andrea Weedon | 6–2, 6–2 |
| Winner | 7. | 14 May 2019 | $15,000 | Cancún, Mexico | Hard | Marcela Zacarias | Thaisa Grana Pedretti Eduarda Piai | 6–3, 7–6 |
| Winner | 8. | 27 July 2019 | $15,000 | Cancún, Mexico | Hard | Thaisa Grana Pedretti |  Dewi Dijkman Isabelle Haverlag | 7–5, 6–3 |
| Winner | 9. | 23 November 2019 | $25,000 | Naples, Florida, United States | Hard |  Gabriela Talaba |  Lea Boskovic  Seone Mendez | 7-5 6-2 |