John Ilhan, Turkish-Australian businessman, founded Crazy John's (born 1965)

John Ilhan was an Australian businessman. He was the founder of Crazy John's mobile phone retail chain and, in 2003, was the richest Australian under 40 years of age.

Crazy John's was a mobile phone retail chain in Australia started by Turkish Australian businessman John Ilhan. Crazy John's was the largest independent phone retailer in Australia, employing more than 400 people with more than 600 retail stores. Following his death in 2007, Ilhan's widow Patricia sold her stake in the company to Vodafone Australia, now a part of TPG Telecom. Originally a dealer of Telstra Mobile, Crazy John's became a Mobile Virtual Network Operator through the Vodafone Australia network, dealing directly with customers and offering its own competitive mobile phone deals and plans.