|Origin||below Pinnamutta-Murrawong Hill|
|Mouth||confluence with Fitzroy River|
|Length||224 kilometres (139 mi) |
|Source elevation||594 metres (1,949 ft) |
|Mouth elevation||251 metres (823 ft)|
|Avg. discharge||711,000 ML/year |
It was named after the first European to discover the river, Frank Hann, who had seen it during his expedition to the region in 1898 and named it the Phillips River. It was renamed in 1900 by the Surveyor General H F Johnston to honour Hann; a Philips River already existed in the south of the state.
The river rises below Mount Lacy and Sir John Gorge and then flows in a southerly direction past Mount Elizabeth then crossing the Gibb River Road. The river then cuts through the Barnett Range and then passes through the Phillips Range via Moll Gorge and flows through the Barnett Range until it flows into the Fitzroy River, of which it is a tributary, near Pinnamutta-Murrawong Hill.
The Hann has 12 tributaries including Traine River, Barnett River, Harris Creek, Bella Creek, Macnamara Creek, Crocodile Creek and Grey Mare Creek.
- Western Australian Land Information Authority. "History of river names". Retrieved 26 November 2008.
- "Bonzle Digital Atlas - Map of Hann River, WA". 2008. Retrieved 26 November 2008.
- "Department of Water - Hann River - Phillips Range". 2008. Retrieved 26 November 2008.
- "Ausanthrop - Australian Aboriginal tribal database". 2012. Retrieved 29 April 2012.
- "Florabase -Whiteochloa Distribution". 2010. Retrieved 15 September 2010.
- "National River Trust - Inland fish fauna of the Fitzroy river". 2002. Retrieved 15 September 2010.
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