| Official Name: | Bajėnai I |
| 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: | Josvainiai Eldership |
| Population As Of: | 2011 |
| Population Total: | 29 |
| Timezone: | EET |
| Utc Offset: | +2 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +3 |
| Coordinates: | 55.1669°N 23.7639°W |
Bajėnai I (Bajėnai 1st, formerly Russian: Бояны, Polish: Bojany) is a village in Kėdainiai district municipality, in Kaunas County, in central Lithuania. According to the 2011 census, the village had a population of 29 people. It is located from Skaistgiriai, by the Kriaušiupys rivulet, nearby the road 25px Aristava-Kėdainiai-Cinkiškiai.
A fragment of an ancient stone axe has been found in Bajėnai I. The Bajėnai Manor is known since the end of the 16th century. In the 19th century, it belonged to the Tyszkiewicz family and later to the Jesuits. They have created a dairy and vegetable farm in Bajėnai.