Costco San Marcos Gas Prices
725 Center Drive, San Marcos, CA 92069
Warehouse #1080
50th cheapest of 121 in California
Today's pump prices
per gallon
Regular Unleaded
$4.899Premium Unleaded
$5.299Diesel
Not sold at this stationPrices last refreshed — always verify at the pump.
30-day price trend
RegularPremium
Costco San Marcos Gas Station Hours
- Monday5:30AM – 10PM
- Tuesday5:30AM – 10PM
- Wednesday5:30AM – 10PM
- Thursday5:30AM – 10PM
- Friday5:30AM – 10PM
- Saturday6AM – 8:30PM
- Sunday6AM – 7:30PM
A current Costco membership card is required to fuel up. Hours may differ on holidays — confirm at the warehouse before a long drive.
Costco San Marcos Warehouse Hours
- Monday10AM – 8:30PM
- Tuesday10AM – 8:30PM
- Wednesday10AM – 8:30PM
- Thursday10AM – 8:30PM
- Friday10AM – 8:30PM
- Saturday9:30AM – 7PM
- Sunday10AM – 6PM
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