DIET PEPSI® 21oz Price at KFC (2026)
A DIET PEPSI® 21oz at KFC in United States is priced at $3.19 as of October 2026.
KFC's DIET PEPSI® 21oz is priced at $3.19 in the United States right now (October 2026). That's about 0% above the typical KFC drink item — the 9th-most-expensive of 19 we track. It's available at around 497 KFC locations across the United States. Prices are sourced from delivery platforms and refreshed regularly. See how it stacks up across other chains, and track its price for free, on MenuPriceToday.
How this compares in Drinks
19 items tracked| This item | $3.19 |
| Drinks median | $3.19 |
| Cheapest — PEPSI® 16oz | $2.49 |
| Most expensive — Pepsi | $3.59 |
| vs Drinks median | 0% |
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