Medium Diet Coke Price at McDonald's (2026) — Iowa

A Medium Diet Coke costs $2.59 at McDonald's in Iowa, United States (updated September 2026).

A Medium Diet Coke® at McDonald's costs $2.59 in the United States as of September 2026. That's about 13% above the typical McDonald's drink item — the 1st-most-expensive 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. Check the full McDonald's menu or compare drink prices on MenuPriceToday.

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