The St Crispin Street Fair is a fair held periodically in the Market Square of Northampton, England. It is organised by Northampton Borough Council.

The event is a travelling funfair with over 100 amusement rides, usually operating on several days of the October half-term school holiday with the precise days varying from year to year. In 2012, shop owners raised concerns about how the new fair could affect their business during Hallowe'en weekend.^[1] In 2014, the fair was held from 25 to 29 October with a large part of it held on a nearby car park.