The following is a list of the 25 most popular STC Chapters and SIGs on Twitter (if popularity is a reflection of the number of followers). The list is ordered from most popular to least popular.
| Rank | Chapter or SIG | Twitter Account |
| 1 | STC Accessibility SIG | @stcaccess |
| 2 | STC San Diego and Orange County | @stcsocal |
| 3 | STC Washington, DC | @stcwdc |
| 4 | STC Chicago | @stchicago |
| 5 | STC Summit | @stc_summit |
| 6 | STC France | @stcfrance |
| 7 | STC Technical Editing SIG | @stc_te_sig |
| 8 | STC Alberta | @stcalberta |
| 9 | STC Europe SIG | @stceusig |
| 10 | STC Carolina Chapter | @stc_carolina |
| 11 | STC Austin | @stc_austin |
| 12 | STC India | @stcindia |
| 13 | STC Atlanta | @stcatlanta |
| 14 | STC Rocky Mountain | @stcrockymtn |
| 15 | STC Silicon Valley | @stcsvc |
| 16 | STC Rochester | @stc_rochester |
| 17 | STC UK & Ireland | @stcukandi |
| 18 | STC Vancouver and British Columbia | @stccwc |
| 19 | STC Management SIG | @lonewritersig |
| 20 | STC Single Sourcing SIG | @stc1ssig |
| 21 | STC Pittsburgh | @stcpgh |
| 22 | STC New England | @stcnewengland |
| 23 | STC Lone Star (Dallas/Ft Worth) | @stclonestar |
| 24 | STC Puget Sound | @stcpugetsound |
| 25 | STC Houston | @stchouston |
