The survey showed that delegates in Sheffield accounted for an estimated direct spend of £132.6m in 2014, up from £117.3m in 2013.
Association conferences accounted for 29% of business in Sheffield, compared to the national average of 18% in the rest of the UK.
Brendan Moffett, director of Marketing Sheffield, said: "This is a strong indication of the success of Marketing Sheffield initiatives such as our Conference Ambassador Programme which specifically seeks to increase association conference business working with local ambassadors.
"Large scale conferences and business events also provide great profile for the city, allowing us to showcase both Sheffield’s fields of expertise and city vibrancy, to national and international audiences."
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