An S bridge is a bridge whose alignment follows a reverse curve, like the letter "S" in plan.

S Bridge may also refer to:

• Claysville S Bridge, historic bridge on the National Road in Washington County, Pennsylvania
• S Bridge (Womelsdorf, Pennsylvania), former historic bridge in Womesldorf, Pennsylvania
• S Bridge II, historic bridge on the National Road near New Concord, Ohio
• S Bridge, National Road, historic bridge on the National Road near Old Washington, Ohio
• Soo Line Railroad Bridge, historic railroad bridge in Eau Claire, Wisconsin

This disambiguation page lists articles associated with the title S bridge.
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