The United States is a majorly Christian nation. 
But this map, first seen on Mark J Perry's Twitter, answers the burning question of what faiths come in second place in each state.

Based on data from Association of Statisticians of American Religious Bodies, which contributes to the religious portion of the census each decade, the map displays colors for various religions.
As you can see, the Northeast gravitates toward Judaism, while Buddhism engulfs the entire West coast. Twenty states across Middle America and the South practice Islam, making it the largest non-Christian religion in the country. But one following sticks out — Baha'i in South Carolina.
Baha'i religion South CarolinaBaha'is of the United StatesBaha'i communities across South Carolina.
Take a look at the spread of Baha'i communities across the Palmetto state, according to the official website of the Baha'is of the United States.  
Baha'i is the world's youngest independent religion, founded in 1817. Practitioners believe that humanity constitutes a single race which should unify into a global society. Belief in one God, as well as daily meditation and prayer, will help the human race achieve oneness. Because of these ideals, Baha'is come from a wide variety of social and ethnic backgrounds.
Here's another version of the second largest religion at the county level, found on the Washington Post.