| Showerthoughts | Showerthoughts | 34,139,618 |
| AmItheAsshole | Am I the Asshole? | 24,089,165 |
| OldSchoolCool | OldSchoolCool: History's cool kids, looking fantastic | 18,714,627 |
| MapPorn | Map Porn, for interesting maps | 5,611,359 |
| changemyview | Change My View (CMV) | 3,786,986 |
| atheism | atheism | 2,916,349 |
| likeus | Conscious Like Us | 2,756,447 |
| tipofmytongue | TOMT: When you can't remember that…thing… | 2,559,843 |
| CasualConversation | The friendlier part of Reddit. | 2,538,861 |
| conspiracy | conspiracy | 2,194,989 |
| Piracy | Piracy: ꜱᴀɪʟ ᴛʜᴇ ʜɪɢʜ ꜱᴇᴀꜱ | 2,110,776 |
| thalassophobia | Thalassophobia | 1,645,525 |
| AMA | Ask Me Anything | 1,540,993 |
| help | For all your questions about Reddit! | 1,239,043 |
| ask | /r/Ask | 1,174,864 |
