Medium Diet Coke Price at McDonald's (2026)

A Medium Diet Coke at McDonald's in United States is priced at $2.29 as of September 2026.

A Medium Diet Coke® at McDonald's costs $2.29 in the United States as of September 2026. It's available at around 471 McDonald's locations across the United States. Prices are sourced from delivery platforms and refreshed regularly. Check the full McDonald's menu or compare drink prices on MenuPriceToday.

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