The importance of wavelength division demultiplexers (WDM) reside in its aggressive use in many areas of industry which are based on signal processing, especially in the fields of telecommunications, optical computing, integrated photonics circuits and sensing applications. Plasmonic wavelength division demultiplexers are essential component for on chip nanoscale plasmonic systems. In this work, we present nanoscale plasmonic wavelength-selective demultiplexer based on feedback resonator. The devices are based on a thin layer of silver with waveguides etched onto it having small foorprint. These devices can be easily tuned to any specific wavelength in the IR range.