Jackson and Sophia are both on top of the baby names world this year. Jackson is enjoying the supreme spot on the boys' list of popular names for the first time. Sophia is relishing her fourth year as the leader of the girls' list.

Licking his wounds just under Jackson is Aiden, bumped down to number 2 on the boys' list after eight long years in the top spot. Last year's quartet of top 10 "J" names has survived the competition, with Jack, Jacob, Jayden – and of course, Jackson – as members of this boys' club.

Emily hopped up from number 11 to number 9 on the girls’ top names list this year – her first time in the top 10. She joins her close cousin Emma, who's feeling confident in the number 2 spot for the third year in a row. Meanwhile, Madison has slipped quietly out of the top 10.

Click on each name below to see its popularity over time, common sibling names, and more.

Note: To capture true popularity, our exclusive baby names list combines names that sound the same but have multiple spellings (like Sophia and Sofia; Jackson, Jaxon, and Jaxson). Our data comes from more than half a million parents who shared their baby's name with us in 2013.