The Burnett Highway passes through the locality from the south to the north-east. Its intersection with the Waruma Dam Road is the official location of the town but there is no settlement there today. The Monto Branch Railway passes from north to south through the locality passing through the former town, which was served by the former .
The town and locality take their name from the railway station name given by Queensland Railways Department on 19 June 1925, using the name of the surrounding Cynthia Parish of the County of Yarrol.
Cynthia State School opened on 30 January 1928. It closed in 1954.
- "Cynthia - town in North Burnett Region (entry 9138)". Queensland Place Names. Queensland Government. Retrieved 24 July 2017.
- "Cynthia - locality in North Burnett Region (entry 45337)". Queensland Place Names. Queensland Government. Retrieved 24 July 2017.
- "Queensland Globe". State of Queensland. Retrieved 24 July 2017.
- Queensland Family History Society (2010), Queensland schools past and present (Version 1.01 ed.), Queensland Family History Society, ISBN 978-1-921171-26-0