| Sonia Catalina Mercado | |
| Birth Date: | 1968 10, df=yes |
| Birth Place: | Durango, Durango, Mexico |
| Occupation: | Deputy |
| Alma Mater: | UJED |
Sonia Catalina Mercado Gallegos (born 23 October 1968) is a Mexican politician affiliated with the Institutional Revolutionary Party (PRI). In the 2012 general election she was elected to the Chamber of Deputies to represent the first district of Durango during the 62nd Congress.[1]