National Class Leaders

The National Class Leader List summarizes the 10 highest lactations for milk, protein, fat, and cheese yield in nine age categories. Lactations are 305 days (or less) in length and are official on the AJCA records. These lists include lactations added to the database through January 1, 2026. To qualify for these lists, all test days included in a completed 305- or 365-day lactation record must occur in a herd or herds enrolled in the Production Records Plus, TPE-Plus, REAP Plus programs, or be a Generation Count {4} or higher for registration status.

An asterisk in the column after days milked indicates that the animal was milked more than twice daily during part or all of the lactation. A “V” following the record indicates that it has been verified.

Animals highlighted in yellow were newly recognized in 2025.

Follow this link to see the historical production leaders by age through 2025.