1950 Census records list Montana's population as 591,024

1950 Great Falls replaces Butte as Montana’s largest city (Chapter 20)

1950–1953 Korean War (Chapter 20)

1951 Williston-Basin oil field discovered in eastern Montana (Chapter 20)

1953 Montana’s first television station broadcasts from Butte (Chapter 20)

1953 Hungry Horse Dam completed (Chapter 20)

1955 Open-pit mining begins in Butte (Chapter 20)

1955–1975 Vietnam War (Chapter 20)

1956 Congress passes the Federal Highway Act (Chapter 20)

1959 Anaconda Company sells its newspapers (Chapter 20)