Florida Keys mile markers are part of the driving map
In the Florida Keys, mile markers help people understand distance, addresses, directions, and where a place sits along the Overseas Highway.
In the Florida Keys, mile markers are more than road trivia. They are part of how people explain where things are.
The Overseas Highway stretches through a chain of islands, bridges, towns, and small turns that can blur together if you are new to the area. The green mile-marker numbers help put everything in order. The numbers run down toward Key West, with Mile Marker 0 at the end of U.S. 1 in Key West.
When someone says a restaurant, boat ramp, beach access, resort, or roadside stop is near a certain mile marker, they are giving you a useful U.S. 1 reference. The number tells you roughly where you are along the Keys, and it can be clearer than a town name by itself. Oceanside and bayside directions add another local layer, because the same marker can have places on either side of the road.
A mile marker is still approximate. Keep it with the exact address, entrance, and oceanside or bayside direction, then use FL511 for current traffic and closures. That small bundle is much easier to follow than a marker or town name alone.
Where to see it
U.S. 1 through the Florida Keys, from the upper Keys through Islamorada, Marathon, the lower Keys, and Key West. Use current county, tourism, and road information for closures, events, parking, and travel time.
Explore the area
Sources
- Florida Keys & Key West - Quick Facts
- Florida Keys & Key West - The Highway That Goes to Sea
- FL511 - Current road conditions
Last checked against these sources: July 29, 2026.
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