According to data from the most recent census conducted in 2021, the permanent population of Sâncraiu commune is 1,558 residents. The population density is 27.41 residents per km².
Population distribution:
By villages:
- Sâncraiu – 1,033 residents (66.30%)
- Alunișu – 119 residents (7.64%)
- Brăișoru – 89 residents (5.71%)
- Domoșu – 198 residents (12.71%)
- Horlacea – 119 residents (7.64%)
By ethnicity:
- Hungarian – 1,191 people (76.44%)
- Romanian – 321 people (20.60%)
- Italian – 3 people (0.19%)
- Other ethnicities – 6 people (0.38%)
- Unknown – 37 people (2.37%)
By religion:
- Reformed (Calvinist) – 1,122 people (72.02%)
- Orthodox – 271 people (17.39%)
- Baptist – 50 people (3.21%)
- Greek Catholic – 24 people (1.54%)
- Roman Catholic – 19 people (1.22%)
- Other – 9 people (0.58%)
- Unknown – 63 people (4.04%)
According to the most recent records of the Statistical Office, the population of the commune was 1,491 in 2025.
