How many people can an entire cow feed?

It depends on the size and how lean the cow or "cow" is. Assuming you are referring to an average market steer, which averages around 1250 lbs, the ideal percentage yield is less than 58%. If you get an average carcass weight of 700 lbs or more from that steer, and everyone eats an 8 oz. portion, it could feed an estimated 1400 people for certain.