| Roberto Sacasa Sarria | |
| Office: | President of Nicaragua |
| Term Start: | 5 August 1889 |
| Term End: | 1 January 1891 |
| Successor: | Ignacio Chávez |
| Term Start1: | 1 March 1891 |
| Term End1: | 11 July 1893 |
| Predecessor1: | Ignacio Chávez |
| Birth Name: | Roberto Sacasa Sarria |
| Birth Date: | 27 February 1840 |
| Birth Place: | El Viejo, Federal Republic of Central America |
| Death Place: | Managua, Nicaragua |
| Spouse: | Ángela Sacasa Cuadra |
| Party: | Conservative |
| Occupation: | Physician |
| Nationality: | Nicaraguan |
| Relations: | Silvestre Selva Sacasa (maternal grand-relative) |
Roberto Sacasa Sarria (27 February 1840 – 2 June 1896) was the President of Nicaragua from 5 August 1889 to 1 January 1891 and again from 1 March 1891 to 11 July 1893.[1]
He was the son of Juan Bautista Sacasa Méndez and Casimira Sarria Montealegre, daughter of Ramón de Sarria y Reyes and Francisca Montealegre Romero (sister to Mariano Montealegre y Romero), themselves the offspring of Mariano Ignacio Montealegre Balmaceda and Casimira Romero Sáenz. Casimira was the daughter of Cecilio Antonio Romero Parajeles and Bárbara Sáenz Bonilla. Barbara, in turn, was the daughter of Manuel Sáenz Vázquez and Ana Antonia Bonilla Astúa, herself the daughter of Juan Bonilla Pereira and Francisca Astúa Cháves de Alfaro. Francisca was the daughter of Juan Astúa and Ana Cháves de Alfaro.
His brother Antioco Sacasa Sarria married Ramona Sacasa Cuadra, sister of Angela Sacasa Cuadra his wife.
He was a maternal relative of Silvestre Selva Sacasa, Supreme Director of Nicaragua appointed by the invading forces of Francisco Malespín during the Malespín's War, and Benjamín Lacayo Sacasa, acting President of Nicaragua during the 1940s.
Sacasa, a member of the Conservative Party, had many problems due to a split within the conservatives. A rebellion by ex-president Joaquín Zavala in 1893 led to liberal José Santos Zelaya coming to power, ending 35 years of conservative rule.
He married his cousin Ángela Sacasa Cuadra and had: