Prior to the arrival of the Europeans, the Penrith area was home to the Mulgoa tribe of the Darug people. They lived in makeshift huts called gunyahs, hunted native animals such as kangaroos, fished in the Nepean River, and gathered local fruits and vegetables such as yams. They lived under an elaborate system of Law which had its origins in the Dreamtime. Most of the Mulgoa were killed by smallpox or galgala shortly after the arrival of the First Fleet in 1788. Early British explorers such as Watkin Tench described them as friendly, saying, "they bade us adieu, in unabated friendship and good humour".[3]

The recorded history of Penrith began on 26 June 1789. Eighteen months after the landing of the First Fleet, an exploring party led by Captain Watkin Tench set out to further discoveries made by Governor Arthur Phillip earlier in the month. In the daylight hours of 27 June, Tench and his party discovered the broad expanse of the Nepean River. Tench's party became the first Europeans to see the site of what is now the City of Penrith. Tench later wrote ‘we found ourselves on the banks of a river, nearly as broad as the Thames at Putney and apparently of great depth’. Phillip later named the river after Evan Nepean, the under-secretary of state in the Home Office, who had been largely responsible for the organisation of the First Fleet. From this point, European settlement began in earnest, firstly on the Hawkesbury River, and later southward up the Nepean.  (Wikipedia)