There's No Place Like Home

This saying is listed in the Dictionary of Clichés, which is quoted on TheFreeDictionary.com.

Enough said already, I think. But I'm sure you'd like to know what the Dictionary of Clichés has to say about it:

This phrase is a quotation from the song Home, Sweet Home (1823), words by John Howard Payne and music by Sir Henry Rowley Bishop, from the opera Clari, introduced at London's Covent Garden. The song, sung at the end of the first act, brought down the house ... and quickly became popular throughout the English–speaking world. It was used as an encore by two of the most famous singers of their time, Jenny Lind and Adelina Patti. The text alluded to is "'Mid pleasures and palaces though we may roam, / Be it ever so humble, there's no place like home." Allegedly expressing Payne's own homesickness, the phrase echoes a sixteenth–century proverb listed by John Heywood in 1546 ("Home is homely, though it be poore in syght") and repeated by John Ray in 1670 ("Home is home though it be never so homely").

The setter of this question is not alone, however, in describing this centuries–old proverb as a quote from The Wizard of Oz. Wikipedia does so on its disambiguation page, where it lists some 25 uses from popular culture – the two oldest of which refer to the song Home, Sweet Home and The Wizard of Oz.