Manhattan, New York gets all the fame, but five other American cities share the name—each with its own character.
Most were named directly after NYC's Manhattan (Lenape "Mannahatta" = "island of many hills") by settlers from New York or boosters hoping to borrow prestige. Manhattan, KS was named by New England Emigrant Aid Company agents from—you guessed it—New York.
Manhattan Beach (CA) vs. Manhattan (IL, KS, MT, NV). Also: Manhattan, Colorado (ghost town); Manhattan, Indiana (unincorporated); Manhattan, Oregon (ghost town). The five above are incorporated municipalities.