Places beginning with SO in Oklahoma, United States
- Sobol
- Soldani
- Sooner
- Soonerville
- Soper
- Sophia
- Sorrels
- Southard
- South Cement, Township of
- South Choctaw, Township of
- South Cimarron, Township of
- South Coffeyville
- South Creek, Township of
- South Elk, Township of
- South Fox, Township of
- South Keokuk, Township of
- South Lathram, Township of
- South Seminole, Township of
- South Village
- South Wichita, Township of