Sândominic (Hungarian: Csíkszentdomokos, Hungarian pronunciation: [ˈtʃiːksɛntdomokoʃ]) is a commune in Harghita County, Romania. It lies in the Székely Land, an ethno-cultural region in eastern Transylvania. It is composed of a single village, Sândominic.
According to the 2002 census, the commune has a population of 6,401, with an absolute Székely Hungarian majority of 6,297 or (98.38%). There are also small minorities of Roma, ethnic Romanians and Germans.
Sândominic is religiously homogeneous, with 98.6% of the population professing Roman Catholicism. Unitarian, Romanian Orthodox, and Hungarian Reformed communities also exist.
The name Sândominic is used for most official purposes, but the population usually uses the shortened form Domokos.
Sândominic is located in the upper reaches of the Olt valley, 29 kilometres north of Miercurea Ciuc. The mountain pass to the northwest, leading to the village of Izvorul Mureşului (Hungarian: Marosfő) and on to the large town of Gheorgheni, marks the northern boundary of the traditional region of Felcsík.