| Gelnhausen Codex | |
| Location: | Jihlava, Czech Republic |
| Width: | 180 px |
| Date: | ca. 1400–1408 |
| Place Of Origin: | Jihlava, Bohemia |
| Language(S): | Latin |
| Author(S): | John of Gelnhausen |
| Material: | Parchment |
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.