| Official Name: | Ansainiai |
| 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: | Pelėdnagiai Eldership |
| Population As Of: | 2011 |
| Population Total: | 14 |
| Timezone: | EET |
| Utc Offset: | +2 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +3 |
| Coordinates: | 55.1919°N 23.925°W |
Ansainiai (formerly Russian: Ганусевичи, Polish: Hanusewicze) is a village in Kėdainiai district municipality, in Kaunas County, in central Lithuania. According to the 2011 census, the village had a population of 14 people. It is located from Labūnava, on the shore of the Labūnava Reservoir. There is a memorial for exiled local inhabitants during the Soviet era.
In the beginning of the 20th century, Ansainiai (Hanusewicze) was an okolica, a property of the Butkevičiai, Dautartai, Gineikiai, Hanusaučiai, Ivanaičiai, Jagėlavičiai, Jusevičiai, Kšešanavičiai, Stecevičiai, Uginskiai, Vencevičiai families.
thumb|left|250px|Ansainiai memorial