State/territory
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Railway
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Alabama
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Arizona
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Arkansas
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California
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Colorado
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Connecticut
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Florida
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Georgia
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Illinois
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Indiana
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- Hesston Steam Museum (dual-gauge lines with 3 ft (914 mm) gauge track also present) (separate 14 in (356 mm) gauge railway and separate 7+1⁄2 in (190.5 mm) gauge railway also present) (operating)
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Kentucky
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Louisiana
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Maine
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Massachusetts
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Michigan
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- Tauber Family Railroad (located in Detroit Zoo) (operating)
- Toonerville Trolley[2] in Soo Junction (operating)
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Minnesota
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- Lake Region Threshers Show Dalton MN (600 mm / 1 ft 11+5⁄8 in gauge) (operating)[3]
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Missouri
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Nebraska
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Nevada
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New Hampshire
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New Jersey
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New Mexico
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New York
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North Carolina
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Ohio
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- J&L Narrow Gauge Railroad[7] (located in Youngstown Steel Heritage) (operating)
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Oregon
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Pennsylvania
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Texas
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Utah
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- Bingham Central Railway (defunct)[10]
- S&S Shortline Railroad Park & Museum[11] (separate 7+1⁄2 in (190.5 mm) gauge railway also present) (operating)
- Wild Kingdom Train (located in Lagoon) (separate 2 ft (610 mm) gauge railway named Pioneer Village Railroad and two separate 12 in (305 mm) gauge railways, the more recent one being named Lagoon Miniature Railway, previously present) (operating)
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Virginia
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Washington
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