Jean-Claude Pecker (10 May 1923 – 20 February 2020) was a French astronomer, astrophysicist and author. He was born in Reims, Grand Est, France.
Pecker was a member of the Académie des Sciences and director of the Nice Observatory. He was the secretary-general of the International Astronomical Union from 1964 to 1967. Pecker was the President of the Société astronomique de France (SAF), the French amateur astronomical society, from 1973–1976.
He was awarded the Prix Jules Janssen by the French Astronomical Society in 1967. He was elected a member of the Academia Europaea in 1988.
A minor planet (1629 Pecker) is named after him. Pecker was a vocal opponent of astrology and pseudo-science and was the president of the Association française pour l'information scientifique (AFIS).
