Rich Uncle Pennybags is the round old man with a mustachio in a top hat who serves as the mascot of the game Monopoly. In large parts of the world he is also, or even exclusively, known as Mr. Monopoly.
The unnamed character made his first appearance outside of Monopoly within the Parker Brothers' game Dig, released in 1940, before the U.S. entered World War II. The character did not receive a name until 1946 when the game Rich Uncle was published by Parker Brothers. His likeness appeared on that game's box lid, game instructions, and currency.
Between 1985 and 2008, the character appeared in the second "O" in the word Monopoly as part of the game's logo. More recently, the character is depicted over the word "Monopoly", drawn in a 3-D style, and extending his right hand. The character, however, no longer appears uniformly on every Monopoly game box.
In 1988, Orbanes published the first edition of his book The Monopoly Companion. In the book, all of the characters that appear on the Monopoly board or within the decks of cards received a name. Uncle Pennybags' full name was given as Milburn Pennybags, the character "In Jail" is named "Jake, the Jailbird", and the police officer on Go to Jail is named "Officer Mallory".