Schlatt-Haslen has a population () of . , 3.2% of the population are resident foreign nationals. Over the last 10 years (1999–2009 ) the population has changed at a rate of -6.3%. It has changed at a rate of -5.2% due to migration and at a rate of -0.2% due to births and deaths. Most of the population () speaks
German (1,115 or 97.3%), with
Albanian being second most common (13 or 1.1%) and
Turkish being third (6 or 0.5%). There are 5 people who speak
French. the average number of residents per living room was 0.66 which is more people per room than the cantonal average of 0.59 per room. About 70.3% of the total households were owner occupied, or in other words did not pay rent (though they may have a
mortgage or a
rent-to-own agreement). , there were 356 private households in the district, and an average of 3.2 persons per household. there were 407 apartments in the district. The most common apartment size was 4 rooms of which there were 111. There were 8 single room apartments and 215 apartments with five or more rooms. Of these apartments, a total of 344 apartments (84.5% of the total) were permanently occupied, while 50 apartments (12.3%) were seasonally occupied and 13 apartments (3.2%) were empty. Colors= id:lightgrey value:gray(0.9) id:darkgrey value:gray(0.8) ImageSize = width:960 height:210 PlotArea = height:150 left:100 bottom:50 right:100 AlignBars = justify DateFormat = x.y Period = from:0 till:1500 TimeAxis = orientation:vertical AlignBars = justify ScaleMajor = gridcolor:darkgrey increment:300 start:0 ScaleMinor = gridcolor:lightgrey increment:60 start:0 PlotData= color:yellowgreen width:45 mark:(line,white) align:center bar:1880 from:start till:1417 text:"1,417" bar:1888 from:start till:1314 text:"1,314" bar:1900 from:start till:1383 text:"1,383" bar:1910 from:start till:1441 text:"1,441" bar:1920 from:start till:1454 text:"1,454" bar:1930 from:start till:1381 text:"1,381" bar:1941 from:start till:1354 text:"1,354" bar:1950 from:start till:1329 text:"1,329" bar:1960 from:start till:1174 text:"1,174" bar:1970 from:start till:1162 text:"1,162" bar:1980 from:start till:1129 text:"1,129" bar:1990 from:start till:1197 text:"1,197" bar:2000 from:start till:1146 text:"1,146" ==Heritage sites of national significance==