| Guillermo Neumann | |
| Order1: | 53rd |
| Office1: | Mayor of Ponce, Puerto Rico |
| Term Start1: | 23 April 1851 |
| Term End1: | 30 September 1851 |
| Predecessor1: | Manuel Cedeño de Poveda |
| Successor1: | Vicente Julbe |
| Birth Date: | c. 1800 |
| Death Date: | c. 1860 |
| Children: | Eduardo Neumann Gandia[1] |
| Profession: | Politician |
Guillermo Neumann (c. 1800 - c. 1860) was Mayor of Ponce, Puerto Rico, from 23 April 1851 to 30 September 1851.[2] [3]
Neumann was the administrator of the Ponce Customs House in 1846.[4]
Guillermo Neumann was father to Eduardo Neumann Gandia, who would become a prolific historian.[5]