| Mostyska Raion | |
| Native Name: | Мостиський район |
| Native Name Lang: | uk |
| Settlement Type: | Raion |
| Flag Alt: | Flag of Mostyska Raion |
| Shield Alt: | Coat of arms of Mostyska Raion |
| Coordinates: | 49.7614°N 23.1519°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name1: | Lviv Oblast |
| Parts Type: | Subdivisions |
| Parts Style: | coll |
| P1: | — city councils |
| P2: | — settlement councils |
| P3: | — rural councils |
| P4: | Number of localities: — cities |
| P5: | |
| P6: | 110 — villages |
| P7: | — rural settlements |
| Established Title1: | Established |
| Established Date1: | 1939 |
| Established Title2: | Disestablished |
| Established Date2: | 18 July 2020 |
| Seat Type: | Admin. center |
| Seat: | Mostyska |
| Leader Title: | Governor |
| Leader Title1: | Chairman |
| Unit Pref: | Metric |
| Area Total Km2: | 845 |
| Population Total: | 56206 |
| Population As Of: | 2020 |
| Population Density Km2: | auto |
| Timezone1: | EET |
| Utc Offset1: | +02:00 |
| Timezone1 Dst: | EEST |
| Utc Offset1 Dst: | +03:00 |
| Postal Code Type: | Postal index |
| Postal Code: | 81300—81385 |
| Area Code Type: | Area code |
| Area Code: | 380-3234 |
| Website: | http://mostyska-rda.gov.ua/ Mostyskyi Raion |
Mostyska Raion (Ukrainian: Мостиський район) was a raion (district) in Lviv Oblast in western Ukraine. Its administrative center was Mostyska. The raion was abolished on 18 July 2020 as part of the administrative reform of Ukraine, which reduced the number of raions of Lviv Oblast to seven. The area of Mostyska Raion was merged into Yavoriv Raion.[1] [2] The last estimate of the raion population was
It was established in 1939 along with the entire Lviv Oblast following the Soviet invasion of Poland.
At the time of disestablishment, the raion consisted of three hromadas:[3]