Sam's Club Gas Prices in September 2026: Up 9.59% Nationwide as Sub-$3 Gas Disappears
Across 532 Sam's Club fuel centers in 44 states, regular unleaded rose 35.7 cents in September and diesel rose 74.9 cents. That is the largest percentage increase of the four brands we track. Sam's raised prices more slowly than the others but cut them less afterward, and the sub-$3 member prices from late August were gone by September 3.
Sep 30 Regular Avg
$4.083
+$0.357 (+9.59%) vs Sep 1
Monthly Peak (Sep 20)
$4.158
Stayed within 2¢ of peak through Sep 28
Diesel Net Change
+$0.749
+14.11% (Climbed to $6.054)
Sam's vs. EIA Avg
-32.4¢
EIA National: $4.465 on Sep 28
At Sam's Club fuel centers, the national regular unleaded average rose from $3.726 on September 1 to $4.083 on September 30, an increase of 35.7 cents (+9.59%). Prices rose at 499 of 532 clubs (93.8%), and the median club rose 37 cents, more than at Walmart, Murphy USA, or 7-Eleven.
Sam's rose differently from the other brands. Walmart and Murphy jumped more than 20 cents in a single day on September 10. Sam's raised prices in smaller steps, with no daily increase larger than 10 cents, but it also cut them much less afterward. Its average stayed within 2 cents of the $4.158 peak from September 20 to September 28, then dropped 5.8 cents in the last two days, partly because of Georgia's gas-tax holiday.
1. Fuel Grades: September 1 vs. September 30
| Fuel Grade | Sep 1 | Sep 30 | Change ($) | Change (%) | Sep Avg | Sep High | Sep Low |
|---|---|---|---|---|---|---|---|
| Regular Unleaded | $3.726 | $4.083 | +$0.357 | +9.59% | $3.986 | $4.158 (9/20) | $3.726 (9/01) |
| Midgrade (4 clubs) | $3.704 | $3.869 | +$0.165 | +4.45% | $3.813 | $3.914 (9/19) | $3.704 (9/01) |
| Premium | $4.469 | $4.836 | +$0.367 | +8.20% | $4.733 | $4.906 (9/26) | $4.469 (9/01) |
| Diesel (206 clubs) | $5.306 | $6.054 | +$0.749 | +14.11% | $5.905 | $6.228 (9/22) | $5.306 (9/01) |
2. A Slow Climb That Held
Daily club prices rose in steps, held at each new level, and only started falling in the last two days of the month:
Two Steps Up
Prices rose 8.3 cents over Labor Day week, then 18.3 cents over September 10–12, and stayed near $3.99 through September 16.
The Final 16¢
A second wave added 16 cents and set the monthly high of $4.158 on Sunday, September 20.
Holding Near the Peak
Prices barely moved for eight days, between $4.141 and $4.157, then fell 5.8 cents in the last two days to $4.083. Georgia's tax holiday accounted for about 1.4 cents of that.
Cheapest Day of the Week to Fill Up at Sam's Club
As in August, weekends were the most expensive time to fill up at Sam's Club. Saturday, Sunday, and Monday all averaged about $4.02, while Tuesday through Friday averaged $3.95–$3.97, a gap of about 6 to 7 cents.
3. Regional Breakdown
| Census Region | Clubs | Sep 1 Avg | Sep 30 Avg | Net Change ($) | Net Change (%) | Sep Monthly Avg |
|---|---|---|---|---|---|---|
| Midwest | 136 | $3.698 | $4.114 | +$0.416 | +11.26% | $3.997 |
| West | 79 | $4.397 | $4.873 | +$0.476 | +10.83% | $4.668 |
| South | 280 | $3.508 | $3.824 | +$0.316 | +9.02% | $3.759 |
| Northeast | 37 | $4.045 | $4.241 | +$0.196 | +4.84% | $4.200 |
The Northeast rose least. New Jersey (+1.0¢) and New York (+4.8¢) were almost flat, helped in New York by a long run of price cuts at the Latham club (see below).
4. State-by-State Winners & Losers
| 1. Colorado (14 clubs) | -10.5¢ (-2.71%) |
| 2. New Jersey (5 clubs) | +1.0¢ (+0.24%) |
| 3. Georgia (21 clubs) | +2.2¢ (+0.63%) |
| 4. New York (5 clubs) | +4.8¢ (+1.23%) |
| 5. Montana (2 clubs) | +14.5¢ (+3.36%) |
| 6. Wyoming (2 clubs) | +15.5¢ (+3.88%) |
| 1. Nevada (7 clubs) | +76.9¢ (+17.57%) |
| 2. Indiana (11 clubs) | +54.2¢ (+17.34%) |
| 3. Oklahoma (12 clubs) | +50.6¢ (+14.87%) |
| 4. New Mexico (7 clubs) | +53.7¢ (+14.40%) |
| 5. California (24 clubs) | +74.6¢ (+14.32%) |
| 6. Utah (8 clubs) | +57.5¢ (+13.86%) |
Georgia's Tax Holiday
Georgia's 21 clubs climbed from $3.539 to $3.914 by September 27. On September 30, a day after Governor Kemp suspended the 33.3-cent state gasoline tax, they fell 34.8 cents to $3.562. That made Georgia the cheapest Sam's Club state, ahead of Indiana and Texas.
Cheapest States on September 30Regular avg
- 1. Georgia (21 clubs)$3.562
- 2. Indiana$3.667
- 3. Texas (75 clubs)$3.676
- 4. Mississippi$3.723
- 5. Tennessee$3.737
Most Expensive States on September 30Regular avg
- 1. California (24 clubs)$5.953
- 2. Nevada (7 clubs)$5.143
- 3. Hawaii (1 club)$5.059
- 4. Idaho (1 club)$4.759
- 5. Utah (8 clubs)$4.723
5. Sub-$3 Gas Gone, and Club Extremes
The Sub-$3.00 Clubs Didn't Last
Three clubs started September below $3.00: Lafayette, IN (#8169) at $2.869, Mansfield, TX (#4911) at $2.939, and Terre Haute, IN (#8135) at $2.979. All three were above $3.00 by September 3, and no Sam's Club in our data went below $3.00 for the rest of the month. Indiana went on to post one of the largest increases in the network, +54.2 cents.
Cheapest Clubs, Sep 30
- 1. Latham, NY (#6440)$3.339
- 2. Chattanooga, TN (#8112)$3.399
- 3. Buford, GA (#4780)$3.449
- 4. Albany, GA (#6506)$3.459
- 5. Brunswick, GA (#7658)$3.469
Priciest Clubs, Sep 30
- 1. Folsom, CA (#6620)$6.199
- 2. Santa Clarita, CA (#4824)$6.199
- 3. Palmdale, CA (#4767)$6.199
- 4. Corona, CA (#4709)$6.099
- 5. Gardena, CA (#6617)$5.999
6. Diesel Above $6
At the 206 clubs that sell diesel, the average rose 74.9 cents (+14.11%) to $6.054, after peaking at $6.228 on September 22. Sam's diesel was still 24.6 cents below the EIA national diesel average ($6.382) on September 28. California clubs averaged $7.902 on September 30.
Methodology: Daily club-level prices from the martgasprice.com price feed for 532 Sam's Club fuel centers. National and state figures are simple averages of all clubs reporting that day. No readings were collected on September 18, so that day is excluded. Sam's Club prices shown are member prices. External benchmarks are from AAA and the EIA's Gasoline and Diesel Fuel Update (September 28, 2026).
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