The following highways are numbered 377:
Brazil BR-377
Canada Saskatchewan Highway 377
Japan Japan National Route 377
United States U.S. Route 377 Arizona State Route 377 Arkansas Highway 377 Georgia State Route 377 Hawaii Route 377 Maryland Route 377 (unsigned) Nevada State Route 377 New York State Route 377 Ohio State Route 377 Puerto Rico Highway 377 South Dakota Highway 377 Tennessee State Route 377 Texas: Texas State Highway Loop 377 (former) Farm to Market Road 377 Virginia State Route 377 Wyoming Highway 377