| Member | Join Date | Threads Started | Posts Made | Blog Posts |
|---|
 | OntheButton | October 10, 2012 | 0 | 16 | 0 |
 | Onyx | July 3, 2022 | 0 | 0 | 0 |
 | OOBMAT58 | December 4, 2019 | 0 | 0 | 0 |
| Ookahmi | April 3, 2021 | 0 | 0 | 0 |
 | OooLaHNee | September 18, 2015 | 2 | 10 | 0 |
| OOscore | November 1, 2025 | 0 | 0 | 0 |
 | OpenJo | December 11, 2017 | 0 | 3 | 0 |
| opheliahayesmitchell1 | May 7, 2011 | 0 | 0 | 0 |
 | Opieply | April 29, 2024 | 0 | 0 | 0 |
| opnd32 | June 30, 2013 | 0 | 0 | 0 |
| opponeo | September 27, 2016 | 1 | 1 | 0 |
 | oprisexchange | November 3, 2022 | 0 | 0 | 0 |
| opss | April 29, 2010 | 1 | 2 | 0 |
| opss1004 | May 14, 2017 | 1 | 1 | 0 |
 | opsy | January 23, 2016 | 0 | 1 | 0 |
| Optical | February 8, 2020 | 0 | 0 | 0 |
 | OptiFarms86 | April 4, 2019 | 0 | 0 | 0 |
| OptimismIsKey | September 2, 2015 | 1 | 3 | 0 |
 | opustech | January 21, 2024 | 0 | 0 | 0 |
 | or.shohat | June 17, 2017 | 2 | 6 | 0 |
| oral12 | June 19, 2014 | 2 | 2 | 0 |
| oral2 | June 19, 2014 | 0 | 0 | 0 |
| Orallybivegasr2 | November 18, 2024 | 0 | 0 | 0 |
| orangeashl | June 20, 2025 | 0 | 0 | 0 |
| orangebishop | November 7, 2016 | 0 | 1 | 0 |
| orangechip | February 2, 2014 | 0 | 1 | 0 |
 | orangeman | February 9, 2014 | 2 | 4 | 0 |
| orangepeel | July 10, 2025 | 2 | 2 | 0 |
| OrangePi5 | December 18, 2023 | 2 | 12 | 0 |
| oranginalight | October 21, 2020 | 1 | 1 | 0 |
| Orbg | August 3, 2016 | 0 | 0 | 0 |
| Ord2712 | January 29, 2023 | 1 | 3 | 0 |
| Ordnance | April 23, 2020 | 0 | 0 | 0 |
| orea307 | March 12, 2019 | 0 | 0 | 0 |
| OregonGambler | April 16, 2023 | 0 | 3 | 0 |
| Oregonscott | February 15, 2021 | 3 | 9 | 0 |
| oren1976 | May 11, 2015 | 0 | 1 | 0 |
| Oreo5602 | December 23, 2019 | 0 | 0 | 0 |
| originaliets201 | July 10, 2019 | 0 | 0 | 0 |
 | originalscore | March 30, 2019 | 1 | 1 | 0 |
| orionstars | April 20, 2022 | 0 | 0 | 0 |
 | orionstars5 | November 21, 2023 | 0 | 0 | 0 |
| orionstarsgames | April 26, 2026 | 0 | 0 | 1 |
| orionstarsstake | September 13, 2025 | 0 | 1 | 0 |
| orionstrike | August 20, 2024 | 0 | 0 | 0 |
 | Orivz1974 | June 17, 2024 | 0 | 0 | 0 |
| OrkeAA | February 6, 2013 | 3 | 8 | 0 |
| OrkFromPluto | July 17, 2015 | 6 | 10 | 0 |
 | Orlando2001 | March 15, 2021 | 0 | 0 | 0 |
| orodric321 | September 29, 2020 | 0 | 0 | 0 |
