| Official Name: | Sandykgaçy |
| Pushpin Map: | Turkmenistan |
| Pushpin Mapsize: | 300 |
| Subdivision Type: | Country |
| Subdivision Name: |  Turkmenistan |
| Subdivision Type1: | Province |
| Subdivision Name1: | Mary |
| Subdivision Type2: | District |
| Subdivision Name2: | Tagtabazar District |
| Subdivision Type3: | Rural Council |
| Subdivision Name3: | Sandykgaçy geňeşligi |
| Timezone: | TMT |
| Utc Offset: | +5 |
| Utc Offset Dst: | +5 |
| Coordinates: | 36.5461°N 62.5575°W |
| Elevation M: | 301 |
Sandykgaçy[1] is a village in and the seat of Sandykgaçy geňeşligi (rural council), Tagtabazar District, in Mary Province, Turkmenistan.[2] It is located on the Murghab River. In the Soviet period the name was applied to a fruit and vegetable sovkhoz located at this village.
The Turkmen word sandykgaçy means "box". Atanyyazow explains that in antiquity the name appeared as "Sandykgachan", meaning "boxed (in)", because of the high, steep slopes that enclose the village.[3]
The Panjdeh Incident was an armed engagement between the Emirate of Afghanistan and the Russian Empire in 1885 that led to a diplomatic crisis between the Russian and the British Empires regarding the Russian expansion south-eastwards towards the Emirate of Afghanistan and the British Raj (India). It happened near Sandykgaçy.
The village is served by both the A-388 highway between Serhetabat and Ýolöten and a station on the rail line to Serhetabat.[4]