Railroad Tycoon is a business simulation game series. There are five games in the series; the original Railroad Tycoon (1990), Railroad Tycoon Deluxe (1993), Railroad Tycoon II (1998), Railroad Tycoon 3 (2003), and Sid Meier's Railroads! (2006).

Sid Meier's Railroad Tycoon is a business simulation designed by Sid Meier. The game is the first in the Railroad Tycoon series. The original idea came from the boardgame 1830: The Game of Railroads and Robber Barons.