Johann Peter Jelmoli (né Giovanni Pietro Guglielmoli;[1] 1794 – 19 November 1860) was an Italian[2] businessman and merchant who founded the department store Jelmoli in Zurich, Switzerland.

[3][4][5] In 1813, Jelmoli married Anna Maria Ciolina, daughter of Giovanni Pietro Ciolina, who was a wealthy merchant who was partner in a textile firm in Mannheim, Germany.

Jelmoli completed his apprenticeship with him and rose up to leading the Swiss subsidiaries of Ciolina Brothers in Switzerland.

They had one son; Jelmoli settled in Zurich in 1833, where he changed his name from Guglielmoli to the more germanized Jelmoli.

He died there on 19 November 1860 aged 65.