• Infrastructure on the National Register of Historic Places by state‎ (3 C)

+

• Infrastructure on the National Register of Historic Places in Puerto Rico‎ (1 C, 6 P)

E

• Energy infrastructure on the National Register of Historic Places‎ (2 C, 85 P)

S

• Sewerage infrastructure on the National Register of Historic Places‎ (10 P)

T

• Telecommunications infrastructure on the National Register of Historic Places‎ (1 C, 4 P)
• Transportation infrastructure on the National Register of Historic Places‎ (6 C)

W

• Water supply infrastructure on the National Register of Historic Places‎ (3 C, 88 P)