1866 in Paraguay
# 1866 in Paraguay

Events in the year 1866 in Paraguay.

## Incumbents

* President: Francisco Solano López
* Vice President: Domingo Francisco Sánchez

## Events

* January 31 - Battle of Pehuajó
* May 2 - Paraguayan War: Battle of Estero Bellaco
* May 24 - Battle of Tuyutí
* July 18 - Battle of Boquerón (1866)
* September 1–3 - Battle of Curuzú
* September 22 - Battle of Curupayty

## Deaths

* July 18 - Elizardo Aquino, general, killed in action
