Lauren Lynn McGraw (born 15 August 1944) is one of the last Royal Historians of Oz. She is listed as co-author, along with her mother Eloise Jarvis McGraw, of Merry Go Round in Oz, the last book in the "Famous Forty" Oz series, and also of The Forbidden Fountain of Oz.

The elder McGraw, a professional children's book author, did the actual writing of the books; she credited her daughter Lauren with story contributions. In the prefatory note to Forbidden Fountain, Eloise McGraw calls Lauren Lynn "Assistant Inventor and Head Trouble-Shooter."

Lauren McGraw, a librarian by profession, went by the name Wagner during the period of her marriage. The younger McGraw was also a capable graphic artist and illustrator.

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