US highways 30-39, with branch routes

3-digit "branch" routes are listed under their 2-digit "main" route.  Highways shown in italics have been decommissioned.

US 30

• US 130
• US 230
• US 330
• US 430
• US 530
• US 630
• US 730
• US 830

US 31

• US 131
• US 231
• US 331 [i] (original)
• US 331 [ii] (current)
• US 431

US 32
US 33
US 34
US 35
US 36

• US 136

(US 37 has never existed)
US 38

• US 138

(US 39 has never existed)

Page originally created 1998;
​​last updated Nov. 5, 2016.