St. Louis Gas Prices
Average price per gallon in the St. Louis metro (AAA’s St. Louis (MO only) area), observed Sep 7, 2026 by AAA. Regular is currently $3.91/gal — $0.10 above the Missouri average of $3.82, and $0.24 below the U.S. average of $4.15. That ranks #8 of 8 Missouri metros, cheapest first.
Regular
$3.91
Mid-grade
$4.31
Premium
$4.65
Diesel
$5.57
Regular, change:→ $0.00 Daily change▲ +$0.14 wk▲ +$0.29 mo
Regular — recent trend (94 days)
$3.94$3.49
Jun 6, 2026Sep 7, 2026
Cheaper elsewhere in Missouri?
The cheapest Missouri metros right now, from the same AAA data — the lowest is $0.27 under St. Louis.
| Metro | Regular | vs St. Louis |
|---|---|---|
| Joplin | $3.65 | −0.27 |
| Springfield | $3.71 | −0.21 |
| Kansas City (MO only) | $3.75 | −0.16 |
| St. Joseph | $3.75 | −0.16 |
| Columbia | $3.87 | −0.05 |
| Cape Girardeau | $3.88 | −0.04 |