The town is traversed by the Burley Griffin Way, the major link from and between the Riverina and the Hume Highway near Yass, and ultimately Sydney, Canberra and the coast.

The Olympic Highway traverses the western end of the shire and is the major link through the central west to the Blue Mountains and from there to the Sydney region.

[3] A post office at Harden was opened on 1 January 1870,[4] and in 1926 £2000 of funding was secured to provide extensive improvements to the ageing facility.

[6] The trust has funded key infrastructure in the town, such as a medical centre and community country club.

Harden experiences a climate typical of the South West Slopes, with a large seasonal variation throughout the year.

Under Koppen it is classified as a humid subtropical climate (Köppen: Cfa) with warm to hot summers and cool, cloudy winters.