Abstract This study sought to assess demographic factors affecting organizational citizenship behavior. A sample was taken from one sub-district administrative organization in Phanna Nikhom district, Sakon Nakhon province. Further, to establish a possible relationship between organizational citizenship behavior and important demographic variables (e.g gender, marital status, education, position and experience), a survey was conducted using a total of 56 respondents. It is believed that this study can add a new understanding that can be used to improve the organizational citizenship behavior.