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.

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.

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.

A rebellion by ex-president Joaquín Zavala in 1893 led to liberal José Santos Zelaya coming to power, ending 35 years of conservative rule.