South Baldy is the highest point of the Magdalena Mountains in central New Mexico, in the United States.

It lies just north of the Langmuir Laboratory for Atmospheric Research of the New Mexico Institute of Mining and Technology, and site of the Magdalena Ridge Observatory Interferometer.

South Baldy can be accessed easily from the dirt road leading to Langmuir.

[3] The peak is the site of an annual mountain bike ascent race up the Langmuir Road as part of the Tour of Socorro.

While not of exceptional height for New Mexico mountains, South Baldy is surrounded by low terrain, and hence is a highly visible landmark and the sixth most topographically prominent peak in the state.