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 October 2026.
A Medium Diet Coke® at McDonald's costs $2.29 in the United States as of October 2026. That's about 0% 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.
How this compares in Drinks
3 items tracked| This item | $2.29 |
| Drinks median | $2.29 |
| Cheapest — Diet Coke® | $2.29 |
| Most expensive — Diet Coke® | $2.29 |
| vs Drinks median | 0% |
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