[2] In 1829 the Act for Instituting and regulating Courts of General and Quarter Sessions in New South Wales established courts in the county at Cookbundoon, Goulburn Plains and Inverary.

In 1857, Charles Cowper was a major landowner in the area, and held 19,720 acres (79.8 km2) in the county.

The Encyclopædia Britannica Eleventh Edition mentions Goulburn as being in the county.

[8] The Greater Argyle Council was formed in 2004 after a proposal[9] to make a new local government area to focus on the County of Argyle, formed from an amalgamation of the former City of Goulburn and parts of Mulwaree Shire.

[10] A full list of parishes found within this county; their current LGA and mapping coordinates to the approximate centre of each location is as follows: