Olivia unites us, Theodore divides us, and Oliver is the King in the North. Those are some of the takeaways from a new look at the most popular baby names in every US State in 2020.

Olivia, the nation’s top girl’s name, ranks in the top 5 in every single state except South Dakota…where it is #6. Olivia reigns at #1 in states from Washington to North Carolina and from Minnesota to Texas. In contrast, the 17 states where the similar boy’s name Oliver reigns are all above the Mason-Dixon line, cutting a Northern swath from Alaska to Wisconsin to Maine.

Other regional favorites include Mateo, which is top-5 in every state along the Mexican border, and Wyatt, a favorite in Montana and Wyoming. New Mexico, meanwhile, remains the one and only state smitten with the name Ezekiel—now risen to #3.

Yet the biggest regional contrast of all may be in the name Theodore. Theodore is a top hit in rural Northern states, but largely off the radar elsewhere. The name is 11 times as popular in its top state, Vermont, as in its lowest, Mississippi.

You can explore regional trends in individual names, letter combinations, name endings and more with our freshly updated interactive name map. And look for your own state in these charts of the top 5 for boys and girls from coast to coast.