The Largest Baby Ever Born in AmericaThe largest baby ever born in the United States, still recognized by Guinness World Records, was born on January 19, 1879. Missouri's Record-Breaking 14-Pound BabyHere in Missouri, the largest baby on record was born in Columbia in November 2012. That baby weighed an incredible 14 pounds, 6.4 ounces. Get our free mobile appThe Smallest Baby Ever Born to SurviveOn the opposite end of the spectrum, the smallest baby ever born to survive weighed less than a pound. LOOK: Classic Baby Names that are Going Extinct Stacker counts down old-school baby names that are becoming a rarity Gallery Credit: Stacker