| Username | Title | Posts | Registration date |
|---|---|---|---|
| SmoothCustomer | Rookie Driver | 4 | 2012-02-02 |
| sms003022 | Rookie Driver | 0 | 2023-01-09 |
| SMSRACING | Paddock Rat | 71 | 2009-07-27 |
| Smugzug | Paddock Rat | 34 | 2012-07-31 |
| smurf | Rookie Driver | 3 | 2012-07-11 |
| Smurfette | Rookie Driver | 1 | 2015-12-10 |
| smurfless1 | Rookie Driver | 7 | 2012-09-18 |
| Smurfs Up | Rookie Driver | 1 | 2011-04-03 |
| smurfskier | Rookie Driver | 3 | 2012-06-21 |
| snafu2002 | Rookie Driver | 2 | 2019-04-13 |
| snafuracer | Rookie Driver | 3 | 2013-01-23 |
| snake eyes | Rookie Driver | 6 | 2010-02-23 |
| SnakesOnPlains | Rookie Driver | 0 | 2022-07-10 |
| SnapOversteer | Rookie Driver | 2 | 2015-06-17 |
| Snapshot | Rookie Driver | 5 | 2009-09-14 |
| SneakyMoniquey | Rookie Driver | 3 | 2014-01-14 |
| sneville44 | Rookie Driver | 2 | 2011-05-21 |
| Snidelywhiplash | Rookie Driver | 2 | 2012-11-04 |
| Snoopybane | Rookie Driver | 1 | 2021-09-12 |
| snowfreak566 | Rookie Driver | 1 | 2018-09-10 |
| snowman | Paddock Rat | 26 | 2016-07-07 |
| snuffy | Ripened Lemon | 127 | 2013-06-06 |
| snybny | Paddock Rat | 22 | 2012-09-08 |
| So Dak Ivyleague #1 | Rookie Driver | 0 | 2022-02-09 |
| socal.colin | Effluent | 596 | 2011-11-26 |
| socalmopar | Rookie Driver | 4 | 2013-11-13 |
| Socalmxrider747 | Rookie Driver | 19 | 2015-08-07 |
| SoCalSteve | Rookie Driver | 1 | 2014-08-25 |
| socalsuperhero | Rookie Driver | 5 | 2017-05-18 |
| soccerman1960 | Rookie Driver | 1 | 2016-04-20 |
| Sod Buster | Rookie Driver | 18 | 2010-08-30 |
| SoFlacrapcan | Paddock Rat | 66 | 2010-04-07 |
| Sogster | Rookie Driver | 3 | 2023-09-27 |
| solamf | Paddock Rat | 21 | 2015-07-23 |
| soldmystang | Effluent | 705 | 2009-09-19 |
| Solid | Rookie Driver | 4 | 2013-09-30 |
| solman244 | Lemons Staff Stalker | 1,030 | 2010-08-10 |
| sololl55 | Paddock Rat | 22 | 2013-08-26 |
| Solo_S14 | Rookie Driver | 1 | 2019-02-03 |
| Solracer | Ripened Lemon | 333 | 2009-06-11 |
| Somebody | Ripened Lemon | 109 | 2016-05-23 |
| someoneElseNamedScott | Rookie Driver | 3 | 2017-10-23 |
| someperson | Rookie Driver | 4 | 2010-03-07 |
| sommmatt | Rookie Driver | 8 | 2015-04-28 |
| Sonic | Effluent | 892 | 2009-10-26 |
| Sonny Utahna | Rookie Driver | 8 | 2014-09-09 |
| Sonoma95492 | Rookie Driver | 1 | 2020-12-16 |
| sooie | Rookie Driver | 5 | 2013-06-03 |
| soonerskeeter | Rookie Driver | 1 | 2011-11-15 |
| sophaissen | Rookie Driver | 1 | 2019-05-15 |