|LGA(s)||Moreton Bay Region|
|State electorate(s)||Glass House|
It was named after Stephen Simpson, the Queensland commissioner of lands, who used the area as a camp site in the mid-19th century. Although the normal rules of English grammar would suggest that the locality name should be spelled with a possessive apostrophe, the official titles of place names in Queensland do not include that particular punctuation.
The eastern border is marked by the Stanley River. Peachester State Forest occupies the eastern half of Commissioners Flat.
- Australian Bureau of Statistics (31 October 2012). "Bracalba (State Suburb)". 2011 Census QuickStats.
- "Commissioners Flat (entry 45486)". Queensland Place Names. Queensland Government. Retrieved 30 May 2014.
- "(Place) Naming principles". Queensland Government. Archived from the original on 22 February 2014. Retrieved 8 February 2014.
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