Harden–Murrumburrah is a township and community in the Hilltops Region and is located in the South West Slopes of New South Wales in Australia. Harden is adjacent to both the Canberra region of the Australian Capital Territory and the Riverina Region in the southwest area of NSW. The town is a twin town between Harden and Murrumburrah (which is noted as one of the earliest European immigrant settlements in the southwest of New South Wales).

The Main Southern railway line passes through Harden. It became an important railway town with the line to Blayney branching off a few kilometres beyond Harden at Demondrille. Harden railway station is served by two daily NSW TrainLink XPT services between Melbourne and Sydney in each direction and the twice weekly Xplorer service between Griffith and Sydney. NSW TrainLink trial road coach services 703 and 704 between Wagga Wagga and Canberra via Cootamundra pass through Harden, but as at September 2019 do not pick up or drop off passengers there. Busabout Wagga Wagga have a depot in the town.