| 释义 |
- Incumbents
- Events
- Births
- Deaths
{{Year in Paraguay|1866}}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
Births{{Empty section|date=June 2014}}Deaths- July 18 - Elizardo Aquino, general, killed in action
{{Years in Paraguay}}{{South America topic|1866 in}} 1 : 1866 in Paraguay |