Cheapest Gas in Nampa, ID
Updated April 5, 2026 — Prices updated regularly from EIA data
$2.95
Lowest price at Costco in Nampa
Finding Cheap Gas in Nampa
Every cent counts when you're filling up in Nampa. The difference between the cheapest and most expensive stations in town is $$0.25 per gallon today — pure savings just from choosing the right location.
Maximum Savings in Nampa
Choose Costco over Chevron
$0.25 per gallon
$3.75 per 15-gallon fill • $12.00 per year (est.)
Cheapest Brands in Nampa
| Rank | Brand | Est. Price | Savings vs. Most Expensive |
|---|---|---|---|
| #1 | Costco | $2.95 | $0.25 |
| #2 | Speedway | $3.07 | $0.13 |
| #3 | Circle K | $3.08 | $0.12 |
| #4 | Sunoco | $3.11 | $0.09 |
| #5 | Marathon | $3.12 | $0.08 |
| #6 | BP | $3.14 | $0.06 |
| #7 | Mobil | $3.15 | $0.05 |
| #8 | Exxon | $3.16 | $0.04 |
| #9 | Shell | $3.18 | $0.02 |
| #10 | Chevron | $3.20 | $0.00 |
Gas Saving Tips for Nampa Drivers
- Use a gas rewards credit card. The Costco Citi Visa earns 4% back on eligible gas; Blue Cash Preferred earns 3% at US gas stations. Pairing a reward card with a warehouse club maximizes savings.
- Avoid filling up at highway exits, airports, and tourist areas where convenience premiums routinely add 15-25 cents per gallon.
- Keep your tires properly inflated to the manufacturer's recommended PSI — under-inflated tires reduce fuel economy by up to 3%, costing you money every mile.
- Accelerate and brake gradually. Aggressive driving can reduce fuel economy by 15-40%, directly increasing how often you fill up.
- Track weekly price cycles in your city — most markets follow predictable weekly patterns. Identifying yours and filling on low-price days saves 5-15 cents per gallon consistently.
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