States East of the Rocky Mountains: Complete List

The following 18 U.S. states lie entirely or primarily east of the Rocky Mountains:

• Montana (eastern portion)
• Wyoming (eastern portion)
• Colorado (eastern portion)
• New Mexico (eastern portion)
• North Dakota
• South Dakota
• Nebraska
• Kansas
• Oklahoma
• Texas
• Minnesota
• Iowa
• Missouri
• Arkansas
• Louisiana
• Mississippi
• Alabama
• Georgia
• Florida

Note: Montana, Wyoming, Colorado, and New Mexico straddle the Rockies; only their eastern plains are east of the range.