Gas Prices in Key West, FL Today

Key West drivers and visitors are paying $4.80 to $5.10 per gallon in May 2026, the highest sustained average of any Florida city. The Lower Keys carry a structural fuel premium that isn't matched anywhere else in the state, and the math behind it explains why fills here cost $10 to $15 more than the same gas would in Miami.

Why Key West Is Florida's Most Expensive Fuel Market

Every gallon sold in Key West arrives by tanker truck down US-1 (the Overseas Highway) from mainland Florida supply terminals. That 160-mile haul over 42 bridges from the Florida City fuel terminal adds 8 to 15 cents per gallon in delivery cost alone before retail markup. Stations also have limited above-ground tank capacity due to flood-zone construction requirements, which means more frequent (and more expensive) re-supply runs than mainland operators face.

The competition picture compounds the problem. The Keys have under a dozen functioning retail gas stations between the Seven Mile Bridge and Whitehead Street. Limited supply, geographically captive demand from tourists who can't easily drive elsewhere, and the highest land costs in the state combine to push Key West retail margins well above mainland norms. Florida's 36.4 cent state gas tax is identical here, so the price gap is logistics and competition, not taxes.

Where to Find the Cheapest Gas in Key West

You don't have many options, but the few you do have are worth knowing.

• Old Town / Duval Street area, 33040, the priciest stations target tourist foot traffic and convenience
• New Town / Northern Key West, 33040, bigger-volume stations with slightly better pricing near the Stock Island border
• Stock Island (just outside Key West proper), prices typically run 10 to 25 cents below Key West Old Town
• Big Pine Key / Middle Keys, prices step down materially as you move 30+ miles east on US-1
• Florida City / Homestead (mainland), the last reliably cheap fills before the Keys, plan to top off here on the drive in

Practical Tips for Drivers Heading to the Keys

If you're driving down for a visit, fill up in Florida City or Homestead before you cross over to Key Largo. That single decision saves $10 to $20 versus filling up in Key West itself on a typical tank. For locals, the cheapest reliable strategy is filling up on Stock Island or in Big Pine Key during routine northbound trips and avoiding tourist-corridor stations entirely.

Watch your tire pressure carefully here. Salt air corrodes tire valves faster than mainland conditions, and slow leaks are extremely common in the Keys. A monthly check catches problems before they tank your MPG. Tropical heat also pushes tire pressure higher than dashboard target values, so a cool-morning check is the most accurate read.

Hurricane and Storm-Season Premium

The Keys see the most dramatic pre-storm gas-price spikes in Florida, with documented 30 to 50 cent jumps in 24 hours during evacuation orders. Tankers stop running during named storms, and post-storm restocking can lag the road reopening by 2 to 4 days. If you live in or are visiting the Keys during June to November, keep your tank above half-full when forecasts show developing systems.

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