In a typical year, up to 20 horses are allowed to run in the Kentucky Derby, and that has been the standard field size since the mid‑1970s.

However, the actual number of starters can be slightly lower in any given year if one or more horses scratch shortly before the race, which is why you sometimes see 18 or 19 horses instead of the full 20.

Quick Scoop

  • Standard limit: 20 starters in the Kentucky Derby field.
  • Why 20? The race was capped after an oversized field (23 horses) in 1974 raised safety and logistics concerns.
  • Reality on race day: Late scratches can reduce the field, so you might see 19, 18, or occasionally fewer horses actually break from the gate.
  • How they get in: Horses qualify via a points system called the Road to the Kentucky Derby, which ranks them and determines who earns a spot in that 20‑horse field.

If you’re asking about a specific year’s Derby (like 2025 or 2026), the exact number running will be whatever the final entry list is after any last‑minute scratches, but it will never be more than 20.

Information gathered from public forums or data available on the internet and portrayed here.