The following lists events that happened during 1964 in the Republic of the Congo (Léopoldville).
| Date | Event | |
|---|---|---|
| Orientale Province is reconstituted by the rebel government of the short-lived People's Republic of Congo. | ||
| Simba rebellion followers of Pierre Mulele make a failed attempt to invade Kamituga. | ||
| 5 June | Augustin Matata Ponyo, future prime minister of the Democratic Republic of the Congo, is born in Maniema. | |
| 25 June 25 - 10 July | Republic of the Congo (Léopoldville) constitutional referendum approved by 91% of voters. The country was renamed the "Democratic Republic of Congo" |