The control of Continuous Stirred Tank Reactors (CSTRs) is a critical area in process control engineering due to the inherent nonlinear dynamics and sensitivity to operational disturbances. Traditional control methods have often struggled to handle these complexities effectively, leaving a gap in the literature for more robust solutions. This study addresses this gap by evaluating the performance of four control strategies—Single Feedback Configuration (SFC), Cascade Control Configuration (CCC), Parallel Control Configuration (PCC), and Sliding Mode Control (SMC)—applied to a nonlinear jacketed CSTR modeled as an unstable third-order system. Using MATLAB SIMULINK, we conducted simulations to analyze the effectiveness of each control strategy in setpoint tracking, disturbance rejection, and noise robustness. The findings indicate that CCC provides excellent setpoint tracking, with minimal overshoot and fast response times. SMC excels in disturbance rejection, showing strong robustness against operational variations. PCC is highly effective in managing noise, making it suitable for environments prone to significant process disturbances. SFC, while functional, demonstrates limitations in disturbance handling and overshoot control. These results offer practical guidance for engineers and researchers in selecting the most appropriate control strategies for nonlinear CSTRs. By addressing the gaps in traditional approaches, this study contributes valuable insights and lays the foundation for future advancements in industrial process control systems.