The Chesapeake Bay Bridge in Maryland is about 4.3 miles (roughly 6.9–7.0 km) long from shore to shore.

Quick Scoop

  • Name: Chesapeake Bay Bridge (Gov. William Preston Lane Jr. Memorial Bridge)
  • Total length: About 4.3 miles / 6.9–7.0 km over the bay.
  • Structure: Two parallel spans (eastbound and westbound) forming a dual-span crossing.
  • Height over water: Around 186 feet (about 56.7 m) at the main suspension span to clear large ships.

A useful way to picture it: driving the bridge feels like a several‑minute open‑water crossing where, for a while, all you see is roadway, sky, and the Chesapeake stretching out on both sides. Many drivers describe it as both beautiful and a bit intimidating, especially on windy or foggy days.

Not to confuse with…

There’s also the Chesapeake Bay Bridge–Tunnel in Virginia, which is a different structure entirely and is much longer at about 17.6 miles (28.3 km) from shore to shore. If you see a length close to 17–23 miles, that’s referring to the bridge–tunnel, not the Maryland Bay Bridge you asked about.

TL;DR:
When people ask “how long is the Chesapeake Bay Bridge,” they usually mean the Maryland Bay Bridge, which is about 4.3 miles long.

Information gathered from public forums or data available on the internet and portrayed here.