Washington Average Gas Price
| Regular | Mid-Grade | Premium | Diesel | E85 | |
|---|---|---|---|---|---|
| Month Ago Avg. | $3.86 | $3.76 | $4.69 | $4.89 | $2.3 |
Highest Recorded Average Gas Price In Washington Year to Date
| Price | Date | |
|---|---|---|
| Diesel | $4.94 | 09/13/26 |
| Regular | $3.88 | 09/11/26 |
Top 10 Gas Stations & Cheap Fuel Prices in Washington
Hy-Vee in Washington (528 IA-1)
528 IA-1, Washington, Iowa,
$3.64
Sep 21, 2026
0¢ Cashback
Hy-Vee in Washington (528 IA-1)
528 IA-1WashingtonIowa52353USA
Sinclair in Washington (100 E Madison St)
100 E Madison St, Washington, Iowa,
$3.64
Sep 21, 2026
0¢ Cashback
Sinclair in Washington (100 E Madison St)
100 E Madison StWashingtonIowa52353USA
Conoco in Washington (304 W Madison St)
304 W Madison St, Washington, Iowa,
$3.64
Sep 21, 2026
0¢ Cashback
Conoco in Washington (304 W Madison St)
304 W Madison StWashingtonIowa52353USA
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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.