The iconic scriptwriter died last night after a "long and heartbreaking battle with dementia", his family announced.
Along with Alan Simpson, Galton helped shape modern British comedy, pioneering a formula of sitcom that is emulated to this day.
His manager Tessa Le Bars said: "I have had the great honour of working with Ray for over 50 years and for the last 40 as his manager and friend.
"With his lifelong co-writer, the late Alan Simpson, they were regarded as the fathers and creators of British sitcom.
"The end of an iconic era, but the legacy of Hancock's Half Hour, Steptoe and Son and over 600 scripts is huge.
"They will endure, inspire and bring laughter to the nation for evermore."