Dianne "Di" Thorley (born 1 December 1949 in Stanthorpe, Queensland) is an Australian politician and a former mayor of Toowoomba, Queensland.
Thorley trained as a nurse in Brisbane and later took up a nursing position at Stanthorpe Hospital.
She also spent some time working as a governess in Blackall.
She moved to Toowoomba in 1986, where she worked and owned a number of businesses in the local hospitality industry.
Thorley was elected as a Councillor on Toowoomba City Council in 1997 and became mayor in 2000.
She was returned to office for a second term in 2004.
On 26 June 2007, Thorley confirmed that she would not seek re-election for mayor in March 2008, or any other council position.