The work aims to assess the delamination location in composite laminates using a chaotic oscillator method with vibration measurement. A vibration-based method using a non-linear chaotic oscillator was used in this study due to its sensitivity to the change in vibration signal characteristics. A numerical model of composite laminates with delamination damage under harmonic excitation was developed and the vibration signal obtained from composite laminates was processed using the chaotic oscillator method. A feature named Lyapunov Exponent (LE) was used as a delamination damage index to describe the characteristics of the chaotic oscillator for cases with delamination at varying structural locations. The effects of delamination locations on the developed damage index were analyzed in this work. The results indicated the relationship between the delamination location and the LE feature, demonstrating the feasibility of the chaotic oscillator method to identify delamination location in composite laminates.