Bossonnens has a population () of . , 14.9% of the population are resident foreign nationals. Over the last 10 years (2000–2010) the population has changed at a rate of 21.1%. Migration accounted for 14.4%, while births and deaths accounted for 7%. Most of the population () speaks
French (932 or 89.5%) as their first language,
German is the second most common (41 or 3.9%) and
Portuguese is the third (36 or 3.5%). There are 10 people who speak
Italian. Of the population in the municipality, 276 or about 26.5% were born in Bossonnens and lived there in 2000. There were 207 or 19.9% who were born in the same canton, while 375 or 36.0% were born somewhere else in Switzerland, and 151 or 14.5% were born outside of Switzerland. , there were 412 private households in the municipality, and an average of 2.5 persons per household. , the construction rate of new housing units was 13.8 new units per 1000 residents. Colors= id:lightgrey value:gray(0.9) id:darkgrey value:gray(0.8) ImageSize = width:1020 height:210 PlotArea = height:150 left:100 bottom:50 right:100 AlignBars = justify DateFormat = x.y Period = from:0 till:1100 TimeAxis = orientation:vertical AlignBars = justify ScaleMajor = gridcolor:darkgrey increment:200 start:0 ScaleMinor = gridcolor:lightgrey increment:40 start:0 PlotData= color:yellowgreen width:40 mark:(line,white) align:center bar:1811 from:start till:184 text:"184" bar:1850 from:start till:251 text:"251" bar:1860 from:start till:245 text:"245" bar:1870 from:start till:331 text:"331" bar:1880 from:start till:310 text:"310" bar:1888 from:start till:301 text:"301" bar:1900 from:start till:313 text:"313" bar:1910 from:start till:338 text:"338" bar:1920 from:start till:383 text:"383" bar:1930 from:start till:436 text:"436" bar:1941 from:start till:384 text:"384" bar:1950 from:start till:405 text:"405" bar:1960 from:start till:406 text:"406" bar:1970 from:start till:463 text:"463" bar:1980 from:start till:513 text:"513" bar:1990 from:start till:718 text:"718" bar:2000 from:start till:1041 text:"1,041" ==Heritage sites of national significance==