Determining the optimum locations for automatic rice mills is a critical and complex decision for investors. This decision is an important one because it affects both environmental and financial aspects. This research paper aims to determine optimal sites for setting automatic rice mills in Joypurhat district of Bangladesh considering environmental factors, pre-requisites for running rice mills and paddy production volume in the locality. In the first step the criteria for rice mill site selection are defined and 25 numbers of candidate sites are determined through running a cartographic model, designed for this specific purpose. In the second step 10 numbers of optimal sites are detected amongst the candidate sites by using location-allocation approach.