PA16 may refer to:

• Pennsylvania Route 16
• Pennsylvania's 16th congressional district
• Piper PA-16 Clipper

• Louisiana Highway 834
• Louisiana Highway 838
• Louisiana Highway 84
• Louisiana Highway 840
• Louisiana Highway 840-1
• Louisiana Highway 840-3
• Louisiana Highway 840-6
• Louisiana Highway 848
• Louisiana Highway 85
• Louisiana Highway 858
• Louisiana Highway 86
• Louisiana Highway 866
• Louisiana Highway 87
• Louisiana Highway 874
• Louisiana Highway 87 spur
• Louisiana Highway 87 Spur
• Louisiana Highway 88
• Louisiana Highway 887
• Louisiana Highway 89
• Louisiana Highway 898
• Louisiana Highway 90
• Louisiana Highway 909
• Louisiana Highway 91
• Louisiana Highway 913
• Louisiana Highway 916