The Gelnhausen Codex (Czech Kodex Gelnhausenův) is an early 15th-century manuscript compiled by John of Gelnhausen, city scribe of Iglau (Jihlava).

It is preserved in the city archive of Jihlava, Czech Republic.

It is an important source of 14th-century Czech history.

Media related to Gelnhausen Codex at Wikimedia Commons