From the report:
The top 10 conservative states in 2016 are nearly the same as the top 10 in 2015, except Montana and Tennessee have replaced South Dakota on the list. Eight of the top 10 most liberal states in 2016 were on the top 10 list in 2015. Maine and Maryland have replaced Rhode Island and New Jersey.
These results are based on Gallup Daily tracking interviews throughout 2016 with 177,788 U.S. adults. Gallup asks Americans whether their political views are very conservative, conservative, moderate, liberal or very liberal. The results displayed are based on combining the two conservative categories and the two liberal categories, and then subtracting the difference. The complete state-by-state results for all categories are displayed at the end of this article.
The ideological differences between states can be substantial, with a 49-point difference in net conservatism between the most conservative state (Wyoming) and the most liberal (Vermont). In Wyoming, 49% of residents in 2016 identified as conservative, while 14% identified as liberal — or +35 conservative. At the other end of the ideological spectrum, 26% of Vermont residents identified as conservative and 40% as liberal, or -14 conservative.
The country as a whole remains more conservative than liberal, but this conservative advantage has been narrowing in recent years, mainly because more Americans are identifying as liberal and fewer as moderate. The continued conservative advantage, as well as the narrowing of that advantage, are both evident at the state level.