Portsmouth Average Gas Price
| Regular | Mid-Grade | Premium | Diesel | E85 | |
|---|---|---|---|---|---|
| Week Ago Avg. | $3.94 | $4.4 | $4.84 | $4.84 | - |
| Month Ago Avg. | $3.95 | $4.41 | $4.85 | $4.85 | - |
Highest Recorded Average Gas Price In Portsmouth Year to Date
| Price | Date | |
|---|---|---|
| Diesel | $4.85 | 06/15/26 |
| Regular | $3.95 | 06/15/26 |
Top 10 Gas Stations & Cheap Fuel Prices in Portsmouth
CITGO in Portsmouth (800 Lafayette Rd)
800 Lafayette Rd, Portsmouth, New Hampshire,
$3.58
Jul 19, 2026
0¢ Cashback
Mobil in Portsmouth (1980 Woodbury Ave)
1980 Woodbury Ave, Portsmouth, New Hampshire,
$3.65
Jul 19, 2026
0¢ Cashback
Sunoco in Portsmouth (1166 Greenland Rd)
1166 Greenland Rd, Portsmouth, New Hampshire,
$4.32
Jul 19, 2026
0¢ Cashback
Irving in Portsmouth (2470 Lafayette Rd )
2470 Lafayette Rd, Portsmouth, New Hampshire,
$4.52
Jul 19, 2026
0¢ Cashback
Gibbs in Portsmouth (2975 Lafayette Rd)
2975 Lafayette Rd, Portsmouth, New Hampshire,
$4.59
Jul 19, 2026
0¢ Cashback
Cumberland Farms in Portsmouth (1475 Lafayette Rd)
1475 Lafayette Rd, Portsmouth, New Hampshire,
$4.98
Jul 19, 2026
0¢ Cashback
Mobil in Portsmouth (803 Lafayette Rd)
803 Lafayette Rd, Portsmouth, New Hampshire,
$4.99
Jul 19, 2026
0¢ Cashback
Sunoco in Portsmouth (766 Lafayette Rd)
766 Lafayette Rd, Portsmouth, New Hampshire,
$4.99
Jul 19, 2026
0¢ Cashback
Mobil in Portsmouth (201 Islington St)
201 Islington St, Portsmouth, New Hampshire,
$4.99
Jul 19, 2026
0¢ Cashback
Sunoco in Portsmouth (565 Islington St)
565 Islington St, Portsmouth, New Hampshire,
$4.99
Jul 19, 2026
0¢ Cashback
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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.