Charles S. Liebman (Hebrew: ישעיהו ליבמן; New York City October 20, 1934 – September 3, 2003) was an American political scientist and prolific author on Jewish life and Israel.

According to Cohen (2003), Liebman "argued that American Jews struggle to integrate into the larger society while trying to maintain a distinctive group identity."

He was an observant Jew, concerned about intermarriage, served in the Israeli Defense Forces on an education unit, and was politically a dove regarding Israel.

I find it impossible to be kind to an author who writes.... a statement comparable to saying that an American state is located somewhere between New York and California.

According to an obituary in The Forward, "Liebman was widely regarded as the pre-eminent social scientist of Jews and Judaism in the latter third of the 20th century" (Cohen 2003).