Nintendo has announced their best-selling Amiibos from across the world. There are two charts: one detailing the overall total sales of Amiibo, and one for the Amiibos that have sold the most from their respective production runs (which we don't know the actual number of produced units for). The second chart really shows all the rare Amiibo, while the figurines from first chart are often seen in shops.
Europe (Best-Selling):
Link
Mario
Pikachu
Yoshi
Samus
Fox
Donkey Kong
Marth
Kirby
Luigi
Europe (Best Sell-Through):
Little Mac
Rosalina
AC Villager
Princess Zelda
Marth
Kirby
Wii Fit Trainer
Pit
Captain Falcon
Link
USA (Best-Selling):
Link
Mario
Pikachu
Kirby
Samus
Yoshi
Princess Zelda
Donkey Kong
Peach
Luigi
USA (Best Sell-Through):
Marth
AC Villager
Wii Fit Trainer
Pit
Captain Falcon
Link
Fox
Rosalina
Samus
Yoshi
Japan (Best-Selling):
Link
Kirby
Mario
Marth
Pikachu
Yoshi
Samus
Captain Falcon
Pit
Little Mac
Japan (Best Sell-Through):
Captain Falcon
Pit
Little Mac
AC Villager
Fox
Wii Fit Trainer
Link
Marth
Kirby
Samus
Australia (Best-Selling):
Mario
Pikachu
Link
Kirby
Yoshi
Donkey Kong
Peach
Luigi
Princess Zelda
Rosalina
Australia (Best Sell-Through):
Ike
Mega Man
Sonic
Marth
Little Mac
Rosalina
Kirby
Fox
AC Villager
Wii Fit Trainer