Saint-Jean has a population of 237. Most of the population speaks French as their first language, German is the second most common and Italian is the third. Of the population in the village, 119 or about 60.7% were born in Saint-Jean and lived there in 2000. There were 47 or 24.0% who were born in the same canton, while 13 or 6.6% were born somewhere else in Switzerland, and 7 or 3.6% were born outside of Switzerland. , there were 76 people who were single and never married in the village. There were 106 married individuals, 11 widows or widowers and 3 individuals who are divorced. There were 23 households that consist of only one person and 3 households with five or more people. , a total of 76 apartments were permanently occupied, while 109 apartments were seasonally occupied and 27 apartments were empty. The historical population is given in the following chart: Colors= id:lightgrey value:gray id:darkgrey value:gray ImageSize = width:960 height:210 PlotArea = height:150 left:100 bottom:50 right:100 AlignBars = justify DateFormat = x.y Period = from:0 till:430 TimeAxis = orientation:vertical AlignBars = justify ScaleMajor = gridcolor:darkgrey increment:90 start:0 ScaleMinor = gridcolor:lightgrey increment:18 start:0 PlotData= color:yellowgreen width:40 mark: align:center bar:1850 from:start till:297 text:"297" bar:1860 from:start till:307 text:"307" bar:1870 from:start till:374 text:"374" bar:1880 from:start till:364 text:"364" bar:1888 from:start till:374 text:"374" bar:1900 from:start till:395 text:"395" bar:1910 from:start till:418 text:"418" bar:1920 from:start till:425 text:"425" bar:1930 from:start till:341 text:"341" bar:1941 from:start till:361 text:"361" bar:1950 from:start till:351 text:"351" bar:1960 from:start till:253 text:"253" bar:1970 from:start till:185 text:"185" bar:1980 from:start till:165 text:"165" bar:1990 from:start till:183 text:"183" bar:2000 from:start till:196 text:"196"
There were 99 residents of the village who were employed in some capacity, of which females made up 41.4% of the workforce. the total number of full-time equivalent jobs was 63. The number of jobs in the primary sector was 9, all of which were in agriculture. The number of jobs in the secondary sector was 43 of which 30 or were in manufacturing and 13 were in construction. The number of jobs in the tertiary sector was 11. In the tertiary sector; 1 was in the sale or repair of motor vehicles, 6 or 54.5% were in a hotel or restaurant,. , there were 10 workers who commuted into the village and 69 workers who commuted away. The village is a net exporter of workers, with about 6.9 workers leaving the village for every one entering.
Religion
From the, 187 or 95.4% were Roman Catholic, while 1 or 0.5% belonged to the Swiss Reformed Church. There was 1 individual who was Islamic. 4 belonged to no church, are agnostic or atheist, and 3 individuals did not answer the question.
Education
In Saint-Jean about 73 or of the population have completed non-mandatory upper secondary education, and 16 or have completed additional higher education. Of the 16 who completed tertiary schooling, 56.3% were Swiss men, 43.8% were Swiss women. , there were 3 students in Saint-Jean who came from another village, while 27 residents attended schools outside the village.
