The following highways are numbered 257:
Canada Manitoba Provincial Road 257 Prince Edward Island Route 257 Quebec Route 257
Costa Rica National Route 257
Japan Japan National Route 257
United Kingdom road
United States Alabama State Route 257 California State Route 257 Colorado State Highway 257 Florida State Road 257 (former) Georgia State Route 257 Indiana State Road 257 K-257 (Kansas highway) Kentucky Route 257 Maryland Route 257 Minnesota State Highway 257 Montana Secondary Highway 257 New York State Route 257 Ohio State Route 257 Pennsylvania Route 257 Tennessee State Route 257 Texas State Highway 257 (former) Texas State Highway Loop 257 Farm to Market Road 257 (Texas) Utah State Route 257 Virginia State Route 257