With the global push for cleaner, more sustainable energy solutions gaining momentum, the spotlight is now on innovative fuel alternatives. This study evaluates different rice husk (RH)to municipal solid wastes (MSW) blend ratios to assess gasification performance parameters, including the composition of syngas, gas yield, lower heating values (LHV) and higher heating values (HHV), cold gasification efficiency (CGE), and carbon conversion efficiency (CCE). Experiments were conducted in a fixed-bed updraft gasifier with air as a gasifying medium. Initially, various equivalence ratios (ERs) of 0.25, 0.30, and 0.35 were tested for the RH and MSW gasification system to determine the optimal ER, which was identified as 0.30. At this optimal ER, RH, and MSW gasification resulted in an improved syngas (H2:CO) ratio of 0.60, which is suitable for combustion-based energy recovery (e.g., gas engines, boilers, or co-firing in turbines). A detailed evaluation of RH–MSW blends (100:0, 70:30, 50:50, 30:70, and 0:100) at this optimal ER revealed that among the tested RH–MSW blends, the 70:30 ratio yielded the most favorable results, achieving a higher heating value of 4.71 MJ/Nm3 and a carbon conversion efficiency of 45.18 %, indicating efficient energy recovery and fuel utilization. Mass and energy balance calculations were conducted to validate the overall efficiency of the system. The analysis of FTIR spectroscopy reveals the diverse organic and inorganic functional groups in rice husk and MSW blends, which highlights their corresponding chemical compositions and potential synergy for energy applications. Overall, the co-gasification of MSW and rice husk is a practical and sustainable energy production method with substantial potential for reducing waste volume, generating renewable energy, and supporting circular economic goals.