| Official Name: | Bakainiai |
| Settlement Type: | Village |
| Pushpin Map: | Kėdainiai District Municipality#Lithuania |
| Pushpin Map Caption: | Location in Lithuania |
| Subdivision Name: |  Lithuania |
| Subdivision Type1: | County |
| Subdivision Name1: | Kaunas County |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Kėdainiai district municipality |
| Subdivision Type3: | Eldership |
| Subdivision Name3: | Surviliškis Eldership |
| Population As Of: | 2011 |
| Population Total: | 62 |
| Timezone: | EET |
| Utc Offset: | +2 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +3 |
| Coordinates: | 55.4561°N 24.025°W |
Bakainiai (formerly Polish: Bakajnie, Russian: Бакайни) is a village in Kėdainiai district municipality, in Kaunas County, in central Lithuania. According to the 2011 census, the village had a population of 62 people. It is located 1 km from Surviliškis, by the Liaudė river. There is hillfort in Bakainiai, on the bank of the Liaudė.
Bakainiai castle was mentioned in 1731, by Teutonic Order. At the 18th century there was a well fortified Swedish war camp on the hillfort.