Application to use the system of geography for analyse population density. In T.khamreng A. MungMahasarakhamhas important factor is the city and the countryside some area has less populated but some area has more populated. So every depend on the govermentoffices,market place. As a whole more population area has foods and hight education stadility.When analyze and push level of the population high to less. Then use this convert numbers to colloquialism by fuzzy is mean decision use theory ambiguity. To summarize byfuzzy is number of ambiguity setthe score (Weight) then use imformation populated in2013 to analyse and assess population density by fuzzy kernel graph and Inverse Distance Weighted (IDW), kriging, spline next taken to compare with department of local administration imformation and has number per area. Department of local administration imformation from study case imformation found that all of population in T.talad46,117 people and imformation from population density in T.talad (averge area T.talad to sguare meter) given cell size is mean one cell size 50x50 square kilometre. be equal to 2,500 square kilometre it mean 4.967025.From imformation can control population density in the area and economic area.