| Honorific-Prefix: | The Honorable |
| Rebecca Ynares | |
| Order: | 20th |
| Office: | Governor of Rizal |
| 1Namedata: | Frisco San Juan Jr. (2013-2016) Reynaldo San Juan Jr. (2016-2022) |
| Term Start: | June 30, 2013 |
| Term End: | June 30, 2022 |
| Predecessor: | Casimiro Ynares III |
| Successor: | Nina Ynares |
| 1Namedata1: | Jovita Rodriguez |
| Term Start1: | June 30, 2001 |
| Term End1: | June 30, 2004 |
| Predecessor1: | Casimiro Ynares Jr. |
| Successor1: | Casimiro Ynares Jr. |
| Office2: | Director of the United Coconut Planters Bank |
| Term Start2: | October 10, 1998 |
| Term End2: | June 30, 2001 |
| Birth Name: | Rebecca Alcantara |
| Birth Date: | 26 September 1949 |
| Birth Place: | Taytay, Rizal, Philippines |
| Nationality: | Filipino |
| Party: | Nationalist People's Coalition |
| Children: | 3 (including Nina and Casimiro III) |
| Residence: | Binangonan |
| Alma Mater: | St. Paul University Manila (BS) |
| Spouse: | Casimiro Ynares Jr. |
Rebecca "Nini" Alcantara Ynares (born September 26, 1949) is a Filipina politician from the province of Rizal, Philippines who previously served as governor of the province from 2001 to 2004 and again from 2013 to 2022.[1] [2] [3] [4] She also served as president of Octagon Realty & Development Corporation, JNM Realty & Development Corporation, and Mar-vi Enterprise, Inc. and the director of United Coconut Planters Bank (UCPB) from 1998 to 2001.[5] During her first term as governor, she was concurrently a director of Laguna Lake Development Authority from 2001 to 2004 and treasurer of the League of Provinces of the Philippines.[6] She was preceded as governor by her son Casimiro A. Ynares III and succeeded by her daughter Nina Ynares-Chiongbian.
On March 25, 2020, Ynares tested positive for COVID-19.[7]