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This research focused on the use of organic wastes in SuanSunandhaRajabhat University, Bangkok, Thailand, for producing refuse derived fuels (RDF). Two objectives of the study were (1) to analyze the physical and chemical properties of organic wastes which include mixed fruit & vegetable wastes, mixed food wastes, and mixed leaf & yard wastes, and (2) to produce refuse derived fuels by using different portions of these wastes in accordance with their suitable properties. According to the method, organic wastes were sampled and analyzed for their moisture contents and heating values; then, those with high potential in terms of their heating properties were used at higher portion than those with lower potential to produce RDF. In this case, cassava starch and grease were used as binding agents to mix with those organic wastes. One way ANOVA at the significant level of 95% was employed to compare the difference of heating values among the different portions of RDF. As a result of the study, it was found that (1) mixed fruit & vegetable wastes had the highest moisture content at 78.15% followed by mixed food wastes and mixed leaf & yard wastes at 75.23 and 69.54%. On the other hand, mixed food wastes had the highest heating value at 5,378.29cal/g whereas mixed fruit & vegetable wastes and mixed leaf & yard wasteshad lower heating values at 5,315.71 and 4,848.42 cal/g, respectively; (2) RDF produced by using mixed food wastes: cassava starch: grease at 80:10:10 gave the highest heating value at 7,895.28cal/g.and generated ash content at 14.5%.Besides, the statistical analysis revealed that heating values of five sets of RDF were different at the significant level of .05 [Sig. = 0.000 <µ (0.05)]