Amerigo Vespucci (1454-1512) Italian merchant, explorer and cartographer whose first name was Americus in Latin

Americus, Georgia, a city with a population of around 17,000

Americus, Kansas, a city with a population of around 900

Imre of Hungary (died 1031), also known as Saint Americus or Emeric, a Hungarian prince

Americus, Indiana, a small town in Washington Township