The Kentucky Derby traditionally has a maximum field size of 20 horses. For the 2025 Kentucky Derby, the field is set to feature 19 horses competing after two horses were scratched from the original 21 qualifiers

. In summary:

• Maximum field size: 20 horses
• 2025 Kentucky Derby field: 19 horses entered after scratches

This field size has been standard since 1975, with occasional variations due to scratches or special circumstances