| Official Name: | Palainiškiai |
| 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: | Krakės Eldership |
| Population As Of: | 2011 |
| Population Total: | 0 |
| Timezone: | EET |
| Utc Offset: | +2 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +3 |
| Coordinates: | 55.3311°N 23.8061°W |
Palainiškiai (formerly ru|Палайнишки, pl|Pałajniszki) is a village in Kėdainiai district municipality, in Kaunas County, in central Lithuania. According to the 2011 census, the village was uninhabited. It is located from Ąžuolaičiai, by the Kėdainiai-Krakės road, inside the Josvainiai Forest, by the Smilga river. The Smilga Landscape Sanctuary in located next to Palainiškiai.
At the beginning of the 20th century there was Palainiškiai estate in Josvainiai volost.