The study aims to examine happiness level, the relating to happiness, and the ranking of factors that influence happiness level among household heads in urban and rural areas of Thailand. The study employed both quantitative and qualitative analyses. In the quantitative analysis, the researcher measured happiness level and analyzed the factors relating to happiness by means of an interview questionnaire, where the qualitative analysis was in the form of a focus group discussion. In analyzing the data, the study employed univariate analysis (e.g. ...