The Parish of Cowan is a civil parish of Cumberland County, New South Wales.
The parish is in the Hundred of Dundas and Hornsby Shire Council. The parish is also on the Hawkesbury River.PL Bemi, Map of the Parish of Gidley, 1822 (Surveyor General's Dept of New South Wales (signed) Edward Knapp LS).
Cowan is believed to be an Aboriginal word meaning 'opposite', 'other side' or 'big water' in the language of the Guringgai tribe, a Sydney Aboriginal clan of the area.Joan Rowland (2008), "Cowan". Dictionary of Sydney. Retrieved 26 September 2015.
Today much of the parish is national park, though the towns of Cowan and Brooklyn are in the parish.
The Sydney to Newcastle Freeway and Central Coast and Sydney to Newcastle Railway Lines pass through the parish.
See also Hundred of Cowan, South Australia
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