Category:Narrow gauge railroads in the United States

• Narrow gauge railroads in the United States by state or territory‎ (39 C)

+

• Narrow gauge railroads in Puerto Rico‎ (6 P)

0–9

• 15 in gauge railways in the United States‎ (8 P)
• 18 in gauge railways in the United States‎ (5 P)
• 19 in gauge railways in the United States‎ (2 P)
• 2 ft 6 in gauge railways in the United States‎ (1 C, 12 P)
• 2 ft gauge railways in the United States‎ (38 P)
• 3 ft 2 in gauge railways in the United States‎ (3 P)
• 3 ft gauge railways in the United States‎ (1 C, 255 P)
• 4 ft 3 in gauge railways in the United States‎ (2 P)
• 3 ft 4 in gauge railways in the United States‎ (4 P)
• 3 ft 6 in gauge railways in the United States‎ (1 C, 14 P)
• 3 ft 9½ in gauge railways in the United States‎ (1 P)
• 4 ft 8 in gauge railways in the United States‎ (15 P)