Updated August 18, 2026 - AAA daily average
Diesel Cost per Gallon in Connecticut (2026)
$5.55/GAL
+0.10 vs US average ($5.45)Rank #40 of 50 statesPADD 1
Diesel Tax Breakdown
Federal diesel excise tax24.4c/gal
Connecticut state diesel tax37.7c/gal
Total tax62.1c/gal
Tax as % of price11%
Sources: Federation of Tax Administrators, EIA. Rates as of April 2026.
Nearby States Comparison
CALCULATE YOUR FUEL COST IN CONNECTICUT
Use our trip calculator prefilled at $5.55/gal for Connecticut.
Sources: State diesel average from AAA Gas Prices (gasprices.aaa.com), August 18, 2026; US average and PADD context from the EIA Weekly On-Highway Diesel Fuel Survey (August 17, 2026); state tax from the Federation of Tax Administrators diesel tax table. State prices are representative averages; actual pump prices vary by retailer and location.