The following highways are numbered 323:
Canada Quebec Route 323
China China National Highway 323
Costa Rica National Route 323
Japan Japan National Route 323
United States County Road 323 (Levy County, Florida) Georgia State Route 323 Kentucky Route 323 Louisiana Highway 323 Minnesota State Highway 323 Montana Secondary Highway 323 New York State Route 323 (former) Ohio State Route 323 Puerto Rico Highway 323 Tennessee State Route 323 Texas: Texas State Highway 323 Texas State Highway Loop 323 Farm to Market Road 323 Virginia State Route 323