Costco Gas Prices in Newmarket, Ontario
1 station tracked · Prices last updated: October 1, 2026 at 12:19 AM EDT. Prices refresh about once an hour; the price at the pump is what applies.
Regular$1.679
Premium$1.929
Diesel—
107 Harry Walker Parkway S, Newmarket, ON, L3Y 7B3
Gas hours: Mon-Fri. 6:00am - 9:30pm; Sat. 6:00am - 8:30pm; Sun. 6:00am - 8:30pm
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Compare Costco gas prices in Newmarket before you drive. UPump refreshes prices automatically about once an hour from Costco's public warehouse information.