| Official Name: | Bagtyýarlyk şäherçesi |
| Other Name: | former names Үчаҗы, Ücajy, Учаджы |
| Pushpin Map: | Turkmenistan |
| Pushpin Label Position: | bottom |
| Pushpin Mapsize: | 300 |
| Pushpin Map Caption: | Location in Turkmenistan |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name: | Turkmenistan |
| Subdivision Name1: | Mary Province |
| Subdivision Type2: | District |
| Subdivision Name2: | Baýramaly District |
| Coordinates: | 38.0883°N 62.7975°W |
Bagtyýarlyk şäherçesi, formerly known as Ücajy (Uch-Adzhi), is a town in Baýramaly District, Mary Province, Turkmenistan. The town was known as Üçajy (Үчаҗы) until 20 September 2012, when by Parliamentary Resolution No. 331-IV it was renamed Bagtyýarlyk.[1] The record high temperature of was registered on July 7, 2021.[2]
The original name of the settlement is a compound of two words, üç and ajy, which mean "three" and "bitter", respectively. Atanyyazow explains that the first three water wells drilled here, when the rail line was being extended to Çärjew, yielded bitter water, hence the name, which was later applied to the town and a nearby state farm.[3] [4] The word bagtyýarlyk simply means "having luck or happiness". This name stems from the Persian word "Bakhtyar" (بختیار) meaning "luck or happiness", plus the suffix "-lyk", denoting one who has luck or happiness.
The M37 highway passes through the town. It is also served by a station on the Trans-Caspian Railway.