Mapasingue is a "barrio" (neighborhood) of the city of Guayaquil, Ecuador. Mapasingue was an "hacienda" in the 19th century; in November 1859, a Peruvian army contingent occupied its lands as a result of an agreement between Peruvian President Ramon Castilla and Supreme Chief of Guayas Guillermo Franco, in the matter of the war between the two countries. The peace treaty signed between the two regimes in 1860 was known as the Treaty of Mapasingue.