Which state has the highest diesel prices in 2026?

California has the highest diesel price in our September 4, 2026 AAA table at about $7.71/gal (+31.8% vs the U.S. average).

Which state has the cheapest diesel in 2026?

Oklahoma has the lowest diesel price in our table at about $5.38/gal (-8.0% vs national). Even the cheapest states are far above pre-Iran levels.

Why do diesel prices matter for inflation?

Diesel powers trucking, rail, agriculture, and last-mile delivery. When diesel rises, freight costs rise — and those costs often show up later in groceries, building materials, and online shipping fees, not just on truckers’ fuel receipts.

Diesel Prices by State Ranked 2026: U.S. Average Hits Record $5.85

Q: What is the U.S. average diesel price right now?

As of September 4, 2026, AAA’s national average for diesel is $5.85 per gallon — a new all-time high, above the June 2022 record of $5.8159.

Ranked · Updated September 4, 2026 · First diesel tracker on this site

Last updated: September 4, 2026 · AAA diesel · Data through September 4, 2026

Diesel just set an all-time U.S. record: AAA’s national average is $5.85/gal as of September 4, 2026, edging past the June 2022 high of $5.82. That is about +58% above a year ago ($3.71) and roughly +56% above pre-Iran levels (~$3.76).California leads the state table at $7.71/gal; Oklahoma is cheapest at $5.38 — a spread of $2.33. See also gas by state ranked, gas map, and our diesel record post.

Diesel Quick Factskeepingupwithinflation.com

Metric	Value
U.S. diesel average (September 4, 2026)	$5.85/gal — record
Prior record (Jun 2022)	$5.82
Year ago	$3.71 (+58%)
Pre-Iran (~late Feb 2026)	~$3.76 (+$2.09)
Month ago	$5.37 (+$0.48)
Highest state	California · $7.71
Lowest state	Oklahoma · $5.38
State spread	$2.33/gal

Why diesel is the bigger inflation story than gas

Regular unleaded set a Labor Day record (~$4.15). Diesel set an all-time record ($5.85). Trucking, agriculture, construction, and parcel delivery run on diesel. When middle distillates spike — as they have through the Iran conflict — freight costs rise first, then show up in grocery shelves and shipping fees. That is why diesel belongs on an inflation site even if you never fill a diesel tank yourself.

Most expensive diesel states

#1 California$7.71/gal (+31.8% vs U.S.)

#2 Hawaii$7.00/gal (+19.7% vs U.S.)

#3 Washington$6.81/gal (+16.4% vs U.S.)

#4 Nevada$6.17/gal (+5.5% vs U.S.)

#5 Oregon$6.17/gal (+5.5% vs U.S.)

Cheapest diesel states

#51 Oklahoma$5.38/gal (-8.0% vs U.S.)

#50 Kansas$5.43/gal (-7.2% vs U.S.)

#49 South Dakota$5.44/gal (-7.0% vs U.S.)

#48 Missouri$5.45/gal (-6.9% vs U.S.)

#47 Texas$5.46/gal (-6.6% vs U.S.)

Diesel Prices by State — Full Ranking (September 4, 2026)keepingupwithinflation.com

Sorted highest to lowest. AAA state diesel averages for September 4, 2026. National series: $5.85. Related: diesel record explainer.

#	State	Diesel (September 4)	vs U.S. avg
1	California	$7.71	+$1.86 (+31.8%)
2	Hawaii	$7.00	+$1.15 (+19.7%)
3	Washington	$6.81	+$0.96 (+16.4%)
4	Nevada	$6.17	+$0.32 (+5.5%)
5	Oregon	$6.17	+$0.32 (+5.5%)
6	Pennsylvania	$6.08	+$0.23 (+3.9%)
7	Alaska	$6.01	+$0.16 (+2.8%)
8	Arizona	$5.97	+$0.12 (+2.1%)
9	Maryland	$5.95	+$0.10 (+1.7%)
10	District of Columbia	$5.90	+$0.05 (+0.8%)
11	Virginia	$5.89	+$0.04 (+0.7%)
12	New York	$5.89	+$0.04 (+0.6%)
13	Delaware	$5.88	+$0.03 (+0.5%)
14	Maine	$5.87	+$0.02 (+0.3%)
15	Connecticut	$5.86	+$0.01 (+0.2%)
16	Indiana	$5.86	+$0.01 (+0.1%)
17	Ohio	$5.85	+$0.00 (+0.0%)
18	New Jersey	$5.84	$-0.01 (-0.1%)
19	Illinois	$5.82	$-0.03 (-0.5%)
20	New Mexico	$5.82	$-0.03 (-0.5%)
21	Vermont	$5.81	$-0.04 (-0.8%)
22	Michigan	$5.80	$-0.05 (-0.8%)
23	Massachusetts	$5.79	$-0.06 (-1.0%)
24	Idaho	$5.77	$-0.08 (-1.4%)
25	North Carolina	$5.77	$-0.08 (-1.4%)
26	Rhode Island	$5.75	$-0.10 (-1.7%)
27	New Hampshire	$5.74	$-0.11 (-1.8%)
28	Minnesota	$5.73	$-0.12 (-2.1%)
29	West Virginia	$5.70	$-0.15 (-2.6%)
30	Florida	$5.68	$-0.17 (-2.9%)
31	South Carolina	$5.68	$-0.17 (-3.0%)
32	Iowa	$5.66	$-0.19 (-3.2%)
33	Wisconsin	$5.65	$-0.20 (-3.4%)
34	Georgia	$5.64	$-0.21 (-3.6%)
35	Montana	$5.63	$-0.21 (-3.7%)
36	Utah	$5.63	$-0.22 (-3.8%)
37	Wyoming	$5.59	$-0.26 (-4.4%)
38	Tennessee	$5.59	$-0.26 (-4.5%)
39	Alabama	$5.57	$-0.28 (-4.8%)
40	Nebraska	$5.56	$-0.29 (-4.9%)
41	Colorado	$5.55	$-0.30 (-5.2%)
42	North Dakota	$5.54	$-0.31 (-5.3%)
43	Kentucky	$5.53	$-0.32 (-5.5%)
44	Arkansas	$5.51	$-0.34 (-5.8%)
45	Mississippi	$5.50	$-0.34 (-5.9%)
46	Louisiana	$5.47	$-0.38 (-6.5%)
47	Texas	$5.46	$-0.39 (-6.6%)
48	Missouri	$5.45	$-0.40 (-6.9%)
49	South Dakota	$5.44	$-0.41 (-7.0%)
50	Kansas	$5.43	$-0.42 (-7.2%)
51	Oklahoma	$5.38	$-0.47 (-8.0%)
U.S. national average (AAA)		$5.85	—

Source: AAA Daily Fuel Gauge state diesel averages, September 4, 2026. National record confirmed vs June 2022 prior high ($5.8159). This is our first diesel state snapshot — we will add more dated columns as we refresh.

Diesel price FAQ

What is the U.S. average diesel price right now?

$5.85 per gallon as of September 4, 2026 — a new AAA all-time high (prior: $5.82 in June 2022).

Which state has the highest diesel prices?

California at about $7.71/gal.

Which state has the cheapest diesel?

Oklahoma at about $5.38/gal — still well above year-ago and pre-Iran national levels.

How does this compare with regular gas?

Regular unleaded is about $4.15 nationally (Labor Day weekend record above $4). Diesel is ~$1.70 higher per gallon and broke its absolute record. Full gas ranking: gas prices by state ranked.