Katrina Amy Alexandria Alexis Infield was born and raised in Brighton, England. Her maternal grandmother is Jewish. She took the surname Price after her mother remarried following the split from her biological father when she was a child. Katie Price has an older brother named Daniel and a younger half sister, Sophie Price. She also attended secondary school at Blatchington Mill Secondary School which she later revisited for a TV show called "With a Little Help from My Friends".

In November 2006, Price launched The Katie Price Lingerie Collection in conjunction with Panache, available exclusively at Asda stores, as well as a follow-up jewellery deal with Argos.

In 2007, Price was announced as the new face of Foxy Bingo and launched a hair care range at Superdrug. She also brought out her first perfume, 'Stunning', in August. Her second perfume, 'Besotted', was released in September 2008. November 2007 saw Price releasing her 'Jordan' hair care electrical range at Superdrug. There was a hairdryer, straighteners and curlers. She released a second, similar range in November 2008 under the name 'Katie Price', to somewhat differing design.