A report by R. W. Winks of the Department of Agriculture, Brisbane, surveying for the proposed Degilbo to Gayndah railway line extension, dated 10 November 1897 stated:- "After arranging for a horse, I proceeded to what is known as Irwin's Hotel, an accommodation-house on Didcot Creek, about 9 miles (14 km) from Woowoonga." Degilbo at that time was known as Woowoonga.
Mount Shamrock Provisional School opened on 24 February 1890, closing circa 1894. The school reopened on 7 April 1896 as Mount Shamrock Provisional School. On 1 January 1909, it became Mount Shamrock State School. It closed circa 1935.
Didcot Provisional School opened on 23 November 1908. On 1 January 1909, it became Didcot State School. It closed in 1967.
Demographics
In the 2011 census, Didcot and nearby districts had a population of 287 people.
In the 2016 census, Didcot had a population of 60 people.
In the 2021 census, Didcot had a population of 85 people.
Degilbo-Mundubbera Railway Bridges in October 2016. A total of 12 bridges that are situated on the Mungar Junction to Monto railway line, including the Deep Creek Railway Bridge, are recognized with one Engineering Heritage Marker representing the "best example of a collection of historic railway bridges in Australia".
There are no schools in Didcot. The nearest primary schools are Coalstoun Lakes State School in neighbouring Coalstoun Lakes to the south and Biggenden State School in neighbouring Biggenden to the south-east. The nearest secondary schools are Biggenden State School (to Year 10) and Burnett State College (to Year 12) in Gayndah to the south-west.