How many NPCs are in the Terraria Mobile Version?

Solution 1:

The game has a total of 21 NPCs that can move into your house. They are:

• The Guide
• The Merchant
• The Nurse
• The Painter
• The Dye Trader
• The Demolitionist
• The Dryad
• The Arms Dealer
• The Party Girl
• The Goblin Tinkerer
• The Witch Doctor
• The Clothier
• The Mechanic
• The Angler
• The Traveling Merchant

Additionally, in hardmode you gain:

• The Pirate
• The Truffle
• The Wizard
• The Steampunker
• The Cyborg
• The Tax Collector

Finally, there is one event NPC that do not live in housing:

• Santa Claus (shows up randomly between Dec 15-31st)

If you look at the wiki you can see a list of all the NPCs in the game. You can tell which NPC is only available in the PC version because these NPCs have a small icon of a computer directly after their description. It looks like this: