Wiler has a population () of . , 5.1% of the population are resident foreign nationals. Over the last 10 years (2000–2010), the population has changed at a rate of 9.3%. It has changed at a rate of 2% due to migration and at a rate of 8.3% due to births and deaths. Most of the population () speaks
German (479 or 98.2%) as their first language,
Serbo-Croatian is the second most common (4 or 0.8%) and
Danish is the third (3 or 0.6%). , there were 175 private households in the municipality, and an average of 2.8 persons per household. , the construction rate of new housing units was 16.3 new units per 1000 residents. 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:490 TimeAxis = orientation:vertical AlignBars = justify ScaleMajor = gridcolor:darkgrey increment:100 start:0 ScaleMinor = gridcolor:lightgrey increment:20 start:0 PlotData= color:yellowgreen width:40 mark:(line,white) align:center bar:1850 from:start till:181 text:"181" bar:1860 from:start till:221 text:"221" bar:1870 from:start till:223 text:"223" bar:1880 from:start till:233 text:"233" bar:1888 from:start till:225 text:"225" bar:1900 from:start till:228 text:"228" bar:1910 from:start till:272 text:"272" bar:1920 from:start till:291 text:"291" bar:1930 from:start till:287 text:"287" bar:1941 from:start till:305 text:"305" bar:1950 from:start till:338 text:"338" bar:1960 from:start till:357 text:"357" bar:1970 from:start till:410 text:"410" bar:1980 from:start till:420 text:"420" bar:1990 from:start till:428 text:"428" bar:2000 from:start till:488 text:"488" ==Politics==