Monmouth Average Gas Price
| Regular | Mid-Grade | Premium | Diesel | E85 | |
|---|---|---|---|---|---|
| Week Ago Avg. | $4.6 | $4.74 | $5.06 | $5.05 | $4.01 |
| Month Ago Avg. | $4.6 | $4.74 | $5.06 | $5.05 | $4.01 |
Highest Recorded Average Gas Price In Monmouth Year to Date
| Price | Date | |
|---|---|---|
| Diesel | $5.05 | 06/15/26 |
| Regular | $4.6 | 06/15/26 |
Top 10 Gas Stations & Cheap Fuel Prices in Monmouth
Casey's in Monmouth (1137 N Main St)
1137 N Main St, Monmouth, Illinois,
$4.63
Jul 19, 2026
0¢ Cashback
Casey's in Monmouth (1137 N Main St)
1137 N Main StMonmouthIllinois61462USA
County Market in Monmouth (1120 N 6th St)
1120 N 6th St, Monmouth, Illinois,
$4.69
Jul 19, 2026
0¢ Cashback
County Market in Monmouth (1120 N 6th St)
1120 N 6th StMonmouthIllinois61462USA
Circle K in Monmouth (1010 N Main St)
1010 N Main St, Monmouth, Illinois,
$4.83
Jul 19, 2026
0¢ Cashback
Circle K in Monmouth (1010 N Main St)
1010 N Main StMonmouthIllinois61462USA
Love's in Monmouth (1001 W 11th Ave)
1001 W 11th Ave, Monmouth, Illinois,
$4.83
Jul 19, 2026
0¢ Cashback
Love's in Monmouth (1001 W 11th Ave)
1001 W 11th AveMonmouthIllinois61462USA
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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.