| Petrašiūnai | |
| Settlement Type: | Eldership |
| Subdivision Type: | Country |
| Subdivision Type2: | County |
| Subdivision Name2: | Kaunas County |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Kaunas city municipality |
| Population Total: | 12,835 |
| Population As Of: | 2021[1] |
| Area Total Km2: | 28.46 |
| Population Density Km2: | auto |
| Timezone: | EET |
| Utc Offset: | +2 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +3 |
Petrašiūnai is a neighborhood in the eastern part of the Lithuanian city of Kaunas. Part of larger Petrašiūnai elderate which also consists with Amaliai, Palemonas and Naujasodis neighorhoods. In 2006 it occupied about 28.46 km², with a population of about 18,000. Parts of elderate is on Kaunas Reservoir Regional Park.
Its eponymous estate was established in the 18th century, and it was the center of a volost. In 1946 it was incorporated into the city. After the Kaunas Hydroelectric Power Plant was built in 1960, it grew rapidly and became one of the city's industrial centers. The elderate borders Kaunas Reservoir and includes Pažaislis monastery ensemble.
The elderate contains the Petrašiūnai cemetery, where many distinguished Lithuanian political and social activists are buried.