After three years at the top, Emily has been unseated by Emma as the most popular girl name in the United States, while Jacob remained the nation's most popular boy name for the fourth year in a row. The BabyCenter Baby Names List, which is the largest private list available, was compiled from more than 310,000 BabyCenter members who had babies in 2004. Our list combines names with the same pronunciation but different spellings to give a more accurate view of name popularity.

Although the most popular girl names shifted places, no new names entered the top ten in 2004. For boys, Connor is new to the list, while Zachary has fallen out of the top group.