| Boneclaw | 12 | Undead | Large | 16 | 127 | | chaotic evil | | Mordenkainen's Tome of Foes | | | | | | |
| Brass dragon wyrmling | 1 | Dragon | Medium | 16 | 16 | fly | chaotic good | | Monster Manual (SRD) | 15 | 10 | 13 | 10 | 11 | 13 |
| Brontosaurus | 5 | Beast | Gargantuan | 15 | 121 | | unaligned | | Adventures (Tomb of Annihilation) | | | | | | |
| Bronze dragon wyrmling | 2 | Dragon | Medium | 17 | 32 | fly, swim | lawful good | | Monster Manual (SRD) | 17 | 10 | 15 | 12 | 11 | 15 |
| Brown bear | 1 | Beast | Large | 11 | 34 | | unaligned | | Monster Manual (SRD) | 19 | 10 | 16 | 2 | 13 | 7 |
| Bugbear | 1 | Humanoid (goblinoid) | Medium | 16 | 27 | | chaotic evil | | Monster Manual (SRD) | 15 | 14 | 13 | 8 | 11 | 9 |
| Bugbear chief | 3 | Humanoid (goblinoid) | Medium | 17 | 65 | | chaotic evil | | Monster Manual | | | | | | |
| Bulette | 5 | Monstrosity | Large | 17 | 94 | | unaligned | | Monster Manual (SRD) | 19 | 11 | 21 | 2 | 10 | 5 |
| Bulezau | 3 | Fiend (demon) | Medium | 14 | 52 | | chaotic evil | | Mordenkainen's Tome of Foes | | | | | | |
| Bullywug | 0.25 | Humanoid (bullywug) | Medium | 15 | 11 | swim | neutral evil | | Monster Manual (BR) | 12 | 12 | 13 | 7 | 10 | 7 |
| Cadaver collector | 14 | Construct | Large | 17 | 189 | | lawful evil | | Mordenkainen's Tome of Foes | | | | | | |
| Cambion | 5 | Fiend | Medium | 19 | 82 | fly | any evil alignment | | Monster Manual | | | | | | |
| Camel | 0.12 | Beast | Large | 9 | 15 | | unaligned | | Monster Manual (SRD) | 16 | 8 | 14 | 2 | 8 | 5 |
| Canoloth | 8 | Fiend (yugoloth) | Medium | 16 | 120 | | neutral evil | | Mordenkainen's Tome of Foes | | | | | | |
| Carrion crawler | 2 | Monstrosity | Large | 13 | 51 | | unaligned | | Monster Manual | | | | | | |
| Cat | 0 | Beast | Tiny | 12 | 2 | | unaligned | | Monster Manual (SRD) | 3 | 15 | 10 | 3 | 12 | 7 |
| Catoblepas | 5 | Monstrosity | Large | 14 | 84 | | unaligned | | Volo's Guide to Monsters | | | | | | |
| Cave fisher | 3 | Monstrosity | Medium | 16 | 58 | | unaligned | | Volo's Guide to Monsters | | | | | | |
| Centaur | 2 | Monstrosity | Large | 12 | 45 | | neutral good | | Monster Manual (SRD) | 18 | 14 | 14 | 9 | 13 | 11 |
| Chain devil | 8 | Fiend (devil) | Medium | 16 | 85 | | lawful evil | | Monster Manual (SRD) | 18 | 15 | 18 | 11 | 12 | 14 |
| Champion | 9 | Humanoid (any race) | Medium | 18 | 143 | | any alignment | | Volo's Guide to Monsters | | | | | | |
| Chasme | 6 | Fiend (demon) | Large | 15 | 84 | fly | chaotic evil | | Monster Manual | | | | | | |
| Chimera | 6 | Monstrosity | Large | 14 | 114 | fly | chaotic evil | | Monster Manual (SRD) | 19 | 11 | 19 | 3 | 14 | 10 |
| Chitine | 0.5 | Monstrosity | Small | 14 | 18 | | chaotic evil | | Volo's Guide to Monsters | | | | | | |
| Choker | 1 | Aberration | Small | 16 | 13 | | chaotic evil | | Mordenkainen's Tome of Foes | | | | | | |