This paper uses a deterministic Cobb- Douglas production function to estimate efficiency of pond fish farms from Mymensingh, Bangladesh. We consider estimation of farm specific technical. allocative and economic efficiency using average and frontier production function which accommodates endogenous inputs because exogenous variables are beyond the control of the farms. Farm specific technical and allocative efficiency are estimated separately for both credit and contact farmers. Empirical results show that the mean level of technical efficiency for the credit and contact farmers are J8.84,~ and 98.79 respectively. Both categories of fish farms are technically. allocatively and economically efficient.