Updated April 29, 2026 - EIA Weekly Survey
Diesel Cost per Gallon in Colorado (2026)
$5.29/GAL
-0.30 vs US average ($5.59)Rank #24 of 50 statesPADD 4
Diesel Tax Breakdown
Federal diesel excise tax24.4c/gal
Colorado state diesel tax20.5c/gal
Total tax44.9c/gal
Tax as % of price849%
Sources: Federation of Tax Administrators, EIA. Rates as of April 2026.
CALCULATE YOUR FUEL COST IN COLORADO
Use our trip calculator prefilled at $5.29/gal for Colorado.
Sources: EIA Weekly On-Highway Diesel Fuel Survey, AAA Gas Prices (gasprices.aaa.com), Federation of Tax Administrators diesel tax table. Updated April 29, 2026. State prices are representative averages; actual pump prices vary by retailer and location.