The British Book Awards Children's Book of the Year is a British literary award, given annually to works of children's literature as part of the British Book Awards (known as the Nibbies) . It was established in 1996, replacing the British Illustrated Children's Book of the Year and British Children's Author of the Year categories.

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It is currently sponsored by W H Smith, although previously it has been sponsored by Red House (who also sponsor the Red House Children's Book Award). Previously called the "British Children's Book Award", it was renamed to Children's Book of the Year in 2010.

The British Children's Author of the Year Award was given annually to authors of children's literature as part of the British Book Awards. It was established in 1990 and awarded for the last time in 1995. During 1996 both the British Book Awards both it and the Illustrated Children's Book of the Year award were replaced by the Children's Book of the Year category.

The British Illustrated Children's Book of the Year Award was given annually to illustrated works of children's literature as part of the British Book Awards. It was established in 1991 and awarded for the last time in 1995. For the 1996 British Book Awards both it and the Children's Author of the Year award were replaced by the Children's Book of the Year category.