List of highways numbered 78

International

• Asian Highway 78
• European route E78

  Australia

• Waterfall Way- New South Wales State Route B78

  China

• G78 Expressway

  Iran

• Road 78

  Korea, South

• Gukjido 78

  New Zealand

• New Zealand State Highway 78 - New Zealand's shortest State Highway

  United States

• Interstate 78
• U.S. Route 78
• Alabama State Route 78
• Arizona State Route 78
• Arkansas Highway 78
• California State Route 78
• Colorado State Highway 78
• Connecticut Route 78
• Florida State Road 78
• * County Road 78
• ** County Road 78A
• ** County Road 78B
• * County Road 78
• ** County Road 78A
• * County Road 78
• ** County Road 78A
• Georgia State Route 78
• Hawaii Route 78
• Idaho State Highway 78
• Illinois Route 78
• Iowa Highway 78
• K-78
• Kentucky Route 78
• Louisiana Highway 78
• Maryland Route 78
• Massachusetts Route 78
• M-78
• Minnesota State Highway 78
• * County Road 78
• * County Road 78
• Missouri Route 78
• *Missouri Route 78
• Montana Highway 78
• Nebraska Highway 78
• * Nebraska Spur 78B
• * Nebraska Spur 78C
• * Nebraska Spur 78D
• * Nebraska Spur 78E
• * Nebraska Spur 78F
• * Nebraska Spur 78H
• * Nebraska Spur 78J
• * Nebraska Recreation Road 78K
• Nevada State Route 78
• New Hampshire Route 78
• County Route 78
• New Mexico State Road 78
• New York State Route 78
• * County Route 78
• * County Route 78
• * County Route 78
• * County Route 78
• * County Route 78
• * County Route 78
• * County Route 78
• * County Route 78
• * County Route 78
• * County Route 78
• * County Route 78
• * County Route 78
• * County Route 78
• North Carolina Highway 78
• Ohio State Route 78
• Oklahoma State Highway 78
• Oregon Route 78
• Pennsylvania Route 78
• Rhode Island Route 78
• Tennessee State Route 78
• Texas State Highway 78
• * Texas State Highway Spur 78
• * Farm to Market Road 78
• * Urban Road 78
• Utah State Route 78
• Vermont Route 78
• Virginia State Route 78
• West Virginia Route 78
• Wisconsin Highway 78
• Wyoming Highway 78

• U.S. Virgin Islands Highway 78