Mercer Island Average Gas Price
| Regular | Mid-Grade | Premium | Diesel | E85 | |
|---|---|---|---|---|---|
| Yesterday's Avg. | $4.91 | $5.13 | $5.27 | $5.12 | - |
| Week Ago Avg. | $4.91 | $5.13 | $5.27 | $5.12 | - |
| Month Ago Avg. | $4.91 | $5.13 | $5.27 | $5.12 | - |
Highest Recorded Average Gas Price In Mercer Island Year to Date
| Price | Date | |
|---|---|---|
| Diesel | $5.12 | 08/18/25 |
| Regular | $4.91 | 07/09/25 |
Top 10 Gas Stations & Cheap Fuel Prices in Mercer Island
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Gas Data Methodology
The fuel prices published in this guide are based on the results of research completed by Way.com’s data team. Using a mix of external and internal data, we analyzed millions of prices across U.S. ZIP codes and globally.