I have tracked down and recorded (almost) every single Clan on Fanpop. Here they are.
(If you see 2, 3, or 4 in parentheses it means that is the 2nd 3rd or 4th one)


____Clan
OceanClan
MoonClan
StormClan
MidnightClan
FaithClan
SunClan
CloudClan
JayClan
NightClan
GrassClan
FrostClan
SpiritClan
PineClan
GlacierClan
RainClan
NatureClan
RabbitClan
HailClan
FeatherClan
MothClan
EagleClan
MistyClan
ShadeClan
LilyClan
ForestClan
PetalClan
FoodClan
SageClan
AdderClan
JadeClan
CuteClan
CaveClan
SpotClan
EchoClan
ScarletClan
ElementalClan
FreezeClan
MysticClan
LunarClan
ShoreClan
SootClan
SedgeClan
RainyClan
RussetClan
BrightClan (BrighttClan)
DarkClan
RubyClan
BranchClan
EeveeClan
EarthClan
HazelClan
PawClan
DawnClan
JungleClan
AquaClan
ScorchClan
SparrowClan
SandwichClan
SummitClan
BirdClan
AirClan
SnowClan
FlowerClan
StreamClan
MapleClan
ColdClan
WaterClan
SandClan
MoonClan of the Mist
WaveClan
SmokeClan
FallenClan
LionClan
BrightClna
PolarClan
FoxClan
BreezeClan
BerryClan
CinderClan
WillowClan
ThrushClan
FireClan
DropletClan
EmeraldClan
LightClan
FlameClan
StoneClan
LotusClan
VampireClan
JewelClan (JewlClan)
FernClan
DropsClan
EmberClan
DriftClan
ShockClan
CoralClan
BrambleClan
NeedleClan
StrawberryClan
ScarClan
DappleClan
AthenaClan
AutumnClan
SquirrelClan
FireClan (2)
GothClan
JetClan
TideClan
IrisClan
MeadowClan
StormyClan
PalmClan
SparkClan
FlutterClan
BoulderClan
BlazingClan
BarkClan (closed)
FireClan (3)
ReedClan
SwordClan
EchoClan
WildClan
CheetahClan
BreakawayClan
FlameClan (2)
BurnClan
SpeedClan
EveClan
SpaceClan
NightClan (2)
HeavenClan (HevenClan)
DoveClan
RowanClan
FantasyClan
CloverClan
BoltClan
GloryClan
AngelClan
FieldClan
SpottedClan
DesertClan
RayClan
ShrewClan
LostClan
BlacklightClan
WhisperingClan
RhythmClan
SnowyClan
BrookClan
AfricaClan
ThornClan
BirchClan
TimeClan
MistClan
MistClan
MoonClan (3)
Warriors: Ocean Clan
SunnyClan
BlizzardClan
BambleClan
GoldenClan
BloodClan
BladeClan
RoseClan
IceClan
AmberClan
GleeClan
MountainClan
ShadowbloodClan
LavenderClan
ShootingstarClan
TulipClan
HellClan
ForgeClan
HighriseClan
RazorClan
ValleyClan
LeafClan (2)
FireClan (3)
FinchClan
KestrelClan
StarlingClan
OspreyClan
RainforestClan
CandyClan
MoonClan (4)
ShadeClan (2)
BlazeClan
SeaClan
BlackroseClan
PantherClan

In total: 192 Clans

(If I missed your Clan or any Clan you know of, tell me in the comments and I'll add it.)