How old was Queen Elizabeth when she assumed the throne? April 15, 2020 by Karen Hill Which one? Never mind, it doesn’t really matter because both Queen Elizabeth I and II were 25 when they were coronated. Related FactsWhy isn't Queen Elizabeth II a Saxe-Coburg-Gotha if she was a direct descendent of Queen Victoria?Has Queen Elizabeth had the British throne the longest?Why did Queen Elizabeth of England decide on the family surname Windsor-Mountbaden?Was Sir Francis Drake a pirate at some point in his career which was funded by Queen Elizabeth?Why did Queen Elizabeth I of England ban Celtic music in Ireland and when?How Do You Push a Big Ship Like the Queen Elizabeth II With Your Hands and Overcome Static Friction? About Karen Hill Karen Hill is a freelance writer, editor, and columnist. Born in New York, her work has appeared in the Examiner, Yahoo News, Buzzfeed, among others.