Update in 2016: New record holder.

Ever-Green-View My 1326 -ET now holds the record for most milk produced in one single lactation by a Holstein. She is bred and owned by Thomas J. Kestell of Waldo, Wis. After a 365-day lactation, 1326-ET produced 72,170 pounds of milk, with 2,787 pounds of fat and 2,142 pounds of protein. That' a lot. A whole lot.

What does that equate to? We did the math.
8,295 gallons of milk
If the average person drank three 8 oz. glasses of milk each day, she would have been able to sustain about 121 people each day for one year!
about 7,217 pounds of cheese - that's enough for 115,472 cheeseburgers (each with one ounce of cheese)

"She's always been a really good milk cow, and a very solid type cow," owner Tom Kestell says. "This record wasn't hard on her – she looks great and feels great. She just wasn't stressed out at all, just like the rest of her family." Ever-Green-View My 1326- ET, and was 4 years, 5 months when she made her record-breaking lactation. She is a Stouder Morty-ET daughter and is classified Excellent at 92 points. The farm - Ever-Green-View is owned Tom and Gin Kestell, with son Chris involved in the operation. They have 130 cows with a BAA of 109.7 percent and a Rolling Herd Average of 35,151 pounds of milk, 1,351 pounds of fat, and 1,083 pounds of protein. Congratulations on this incredible accomplishment!