The research was conducted to determine the factors affecting Citizens's satisfaction with public administrative services in the one-stop department of districts in Thai Nguyen Province. The study is based on the survey data of 324 citizens. Data analysis method through SPSS software with descriptive statistical tools, test scale with Cronbach alpha coefficients, discovery factor analysis (EFA) and Regression analysis was performed to clarify the problems related to the research hypothesis. The Regression model consisting of six variables: Capacity of civil servants, Service attitude of civil servants, Facilities, Work assignment process, Time and Cost is used to identify the factors that affect Citizens's satisfaction. The research results show that the variables in the model have a positive relationship with Citizens's satisfaction. In particular, the Capacity of civil servant factor has the highest Beta coefficient of 0.303. From the research results, the author also proposed a number of solutions to improve the satisfaction of citizens at the One-stop shop of districts in Thai Nguyen Province