Costco Gas PriceNow

Costco Grafton gas prices

This station's regular prices have held roughly steady over the past month, at around $3.699 per gallon. Premium is down $0.120 over the same stretch, now at $4.759.

Today's prices

Regular
$3.699
Premium
$4.759

Per gallon, USD · updated July 22, 2026

Updated today · refreshed daily

30-day price history

Regular$3.699Premium$4.759
3.504.004.50Jun 23Jun 30Jul 8Jul 15Jul 22$4.759$3.699
Posted prices at Costco Grafton, past 30 days ($/gal).
View price history as a table
DateRegularPremium
July 22, 2026$3.699$4.759
July 21, 2026$3.699$4.759
July 20, 2026$3.699$4.799
July 19, 2026$3.699$4.799
July 18, 2026$3.599$4.739
July 17, 2026$3.599$4.699
July 16, 2026$3.599$4.769
July 15, 2026$3.599$4.699
July 14, 2026$3.599$4.699
July 13, 2026$3.599$4.699
July 12, 2026$3.599$4.699
July 11, 2026$3.539$4.539
July 10, 2026$3.539$4.539
July 9, 2026$3.589$4.589
July 8, 2026$3.589$4.589
July 7, 2026$3.589$4.589
July 6, 2026$3.589$4.589
July 5, 2026$3.599$4.639
July 4, 2026$3.599$4.639
July 3, 2026$3.639$4.639
July 2, 2026$3.689$4.689
July 1, 2026$3.699$4.739
June 30, 2026$3.699$4.759
June 29, 2026$3.699$4.759
June 28, 2026$3.699$4.759
June 27, 2026$3.699$4.759
June 26, 2026$3.699$4.849
June 25, 2026$3.699$4.849
June 24, 2026$3.699$4.859
June 23, 2026$3.699$4.879

Address

950 Port Washington Rd
Grafton, Wisconsin 53024-9201

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Gas station hours

Mon – Fri
6:00 AM – 10:00 PM
Saturday
6:00 AM – 8:30 PM
Sunday
6:00 AM – 7:30 PM

Warehouse hours

Mon – Fri
10:00 AM – 8:30 PM
Saturday
9:30 AM – 7:00 PM
Sunday
10:00 AM – 6:00 PM

Location

950 Port Washington Rd, Grafton 53024-9201

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Nearby Costco stations

Costco Menomonee FallsMenomonee Falls · 14 mi away$3.499regularCostco PewaukeePewaukee · 22 mi away$3.359regularCostco New BerlinNew Berlin · 28 mi away$3.399regularCostco Pleasant PrairiePleasant Prairie · 53 mi away$3.459regular

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