Diet Coke Price at McDonald's (2026) — California

A Diet Coke costs $2.89 at McDonald's in California, United States (updated October 2026).

Based on the latest tracked prices, the Diet Coke® from McDonald's costs $2.89 in the United States (October 2026). That's about 26% above the typical McDonald's drink item — the 1st-cheapest of 3 we track. It's available at around 471 McDonald's locations across the United States. Prices are sourced from delivery platforms and refreshed regularly. Set a free alert to know the moment this price changes on MenuPriceToday.

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