New Jersey vs Pennsylvania gas prices
Regular gas is $0.08 a gallon cheaper in New Jersey — $1.14 on a 15-gallon fill-up. The two share a border, so that gap is worth knowing before you cross it.
New Jersey
Pennsylvania| Grade | NJ | PA | Diff. | |
|---|---|---|---|---|
| Regular | $4.14 | $4.21 | $0.08NJ | New Jersey |
| Midgrade | $4.71 | $4.67 | $0.04PA | Pennsylvania |
| Premium | $4.99 | $5.05 | $0.06NJ | New Jersey |
| Diesel | $5.45 | $5.59 | $0.14NJ | New Jersey |
Where the $0.08 gap actually comes from
All of it is tax, and then some. The fuel itself is dearer in New Jersey before tax — by $0.05 a gallon — yet it is still $0.08 cheaper at the pump, because Pennsylvania levies $0.13 more per gallon. Policy is doing all of the work here and overcoming a product disadvantage on the way.
Fuel, refining, distribution and marginFederal and state taxes Pre-tax figures are estimates — see the note below.
What the gap is worth
Based on today’s $0.08 per-gallon difference, which moves week to week. Use the fuel cost calculator for your own mileage and vehicle.
Prices by metro area
State averages hide a lot. These are the cheapest metros AAA reports on each side.
Other comparisons
Frequently asked questions
Is gas cheaper in New Jersey or Pennsylvania?
Regular gas is cheaper in New Jersey, at $4.14 a gallon against $4.21 in Pennsylvania — a gap of $0.08, or 1.8%. On a 15-gallon fill-up that is $1.14. Figures are AAA daily state averages for 2026-08-02.
Why is gas more expensive in Pennsylvania?
Entirely because of tax. New Jersey actually pays more for the fuel itself — $0.05 a gallon more before tax — but Pennsylvania levies $0.13 more per gallon, which more than reverses the advantage.
Is diesel cheaper in New Jersey or Pennsylvania?
Diesel is cheaper in New Jersey at $5.45 a gallon, against $5.59 in Pennsylvania — $0.14 a gallon apart.
Is it worth crossing from Pennsylvania into New Jersey to fill up?
If you are already near the line, yes: a 15-gallon fill saves about $1.14. Driving out of your way for it rarely pays — at $4.21 a gallon and 25 mpg, a 3-mile round trip would eat the whole saving in fuel alone, before your time.