| Castellanos | |
| Native Name Lang: | es |
| Settlement Type: | Locality |
| Pushpin Map: | Argentina Santa Fe Province#Argentina |
| Pushpin Map Caption: | Location of Castellanos |
| Coordinates: | -31.2081°N -61.7239°W |
| Subdivision Type: | Country |
| Subdivision Name: | Argentina |
| Subdivision Type1: | Province |
| Subdivision Name1: | Santa Fe |
| Subdivision Type2: | Department |
| Subdivision Name2: | Castellanos |
| Leader Party: | Juntos por el Cambio-PRO |
| Leader Title: | Mayor |
| Leader Name: | Audino Diego Osvaldo |
| Unit Pref: | Metric |
| Population Total: | 340 |
| Population As Of: | 2010 |
| Population Density Km2: | auto |
| Timezone1: | ART |
| Utc Offset1: | -3 |
| Postal Code Type: | CPA base |
| Postal Code: | S2301 |
| Area Code Type: | Dialing code |
Castellanos is a locality in Santa Fe Province in northeastern Argentina.[1] It is located north of Provincial Route 70, next to San Antonio with which it is conurbated, forming the urban conurbation of San Antonio-Castellanos.
Castellanos was founded in 1885. It has a school.[2]