Saint-Aubin-Sauges has a population () of . , 21.2% of the population are resident foreign nationals. Over the last 10 years (2000–2010 ) the population has changed at a rate of 0.8%. It has changed at a rate of 0.6% due to migration and at a rate of 1% due to births and deaths. Most of the population () speaks
French (2,054 or 84.7%) as their first language,
Portuguese is the second most common (106 or 4.4%) and
German is the third (105 or 4.3%). There are 90 people who speak
Italian and 1 person who speaks
Romansh. Of the population in the municipality, 587 or about 24.2% were born in Saint-Aubin-Sauges and lived there in 2000. There were 603 or 24.9% who were born in the same canton, while 592 or 24.4% were born somewhere else in Switzerland, and 582 or 24.0% were born outside of Switzerland. , there were 1,008 private households in the municipality, and an average of 2.3 persons per household. , the construction rate of new housing units was 0.4 new units per 1000 residents. Colors= id:lightgrey value:gray(0.9) id:darkgrey value:gray(0.8) ImageSize = width:1100 height:500 PlotArea = height:350 left: 100 bottom:90 right:100 Legend = columns:3 left:220 top:70 columnwidth:160 AlignBars = justify DateFormat = x.y Period = from:0 till:2500 TimeAxis = orientation:vertical AlignBars = justify ScaleMajor = gridcolor:darkgrey increment:500 start:0 ScaleMinor = gridcolor:lightgrey increment:100 start:0 Colors= id:TO value:yellowgreen legend:Saint-Aubin-Sauges id:ST value:teal legend:Saint-Aubin id:SA value:green legend:Sauges PlotData= color:yellowgreen width:40 mark:(line,white) align:center bar:1784 from:start till:270 text:"270" color:ST bar:1784 from:270 till:368 text:"98" color:SA bar:1850 from:start till:530 text:"530" color:ST bar:1850 from:530 till:778 text:"248" color:SA bar:1860 from:start till:820 text:"820" bar:1870 from:start till:809 text:"809" bar:1880 from:start till:675 text:"675" color:ST bar:1880 from:675 till:938 text:"263" color:SA bar:1888 from:start till:990 text:"990" bar:1900 from:start till:1105 text:"1,105" bar:1910 from:start till:1207 text:"1,207" bar:1920 from:start till:1239 text:"1,239" bar:1930 from:start till:1174 text:"1,174" bar:1941 from:start till:1238 text:"1,238" bar:1950 from:start till:1358 text:"1,358" bar:1960 from:start till:1560 text:"1,560" bar:1970 from:start till:2058 text:"2,058" bar:1980 from:start till:2085 text:"2,085" bar:1990 from:start till:2253 text:"2,253" bar:2000 from:start till:2426 text:"2,426" ==Heritage sites of national significance==