| Settlement Type: | Town |
| Gudžiūnai | |
| Pushpin Map: | Kėdainiai District Municipality#Lithuania |
| Pushpin Map Caption: | Location of Gudžiūnai |
| Coordinates: | 55.5083°N 23.7722°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Ethnographic region |
| Subdivision Name1: | Aukštaitija |
| Subdivision Type2: | County |
| Subdivision Name2: | Kaunas County |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Kėdainiai district municipality |
| Subdivision Type4: | Eldership |
| Subdivision Name4: | Gudžiūnai Eldership |
| Subdivision Type6: | Capital of |
| Subdivision Name6: | Gudžiūnai eldership |
| Established Date: | 1653 |
| Established Title: | First mentioned |
| Population Total: | 491 |
| Population As Of: | 2011 |
| Timezone: | EET |
| Utc Offset: | +2 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +3 |
Gudžiūnai (formerly Polish: Gudziuny, Russian: Гудзюны) is a small town in Kėdainiai district, central Lithuania. It is located on the Dotnuvėlė River. The town has a Catholic Sacred Heart church, a secondary school, and a post office. There is also a train station (Gudžiūnai GS) just outside the town.
The name Gudžiūnai has been in use since at least 1653. The first church was built in 1812, and the current church was built in 1911. At the end of the 19th century Gudžiūnai became a town and from 1919 it was a volost center. During the Soviet era Gudžiūnai was a kolkhoz center.