Michael Berenstain (born December 21, 1951) is an American writer and illustrator of children's books.

[3] His earliest work in the U.S. Library of Congress catalog was published in 1976: K'tonton on an Island in the Sea by Sadie Rose Weilerstein, which he illustrated as Michael Berenstain or Michael Berenstein (Philadelphia: Jewish Publication Society of America).

The third K'tonton book, it features "Adventures of a thumb-sized Jewish boy who must fend for himself when stranded on an island.

Berenstain began investigating Christianity after he married and sent his children to Quaker schools.

He was baptized in a Presbyterian church and eventually partnered with Zondervan, an evangelical Christian publishing company, to produce faith-based Berenstain Bears books.