Welcome to Night Vale is a podcast presented as a radio show for the fictional town of Night Vale, reporting on the strange events that occur within it. The series was created in 2012 by Joseph Fink and Jeffrey Cranor. Published by Night Vale Presents since March 15, 2015, the podcast was previously published by Commonplace Books. Cecil Gershwin Palmer -- the host, main character, and narrator -- is voiced by Cecil Baldwin, while secondary characters are sometimes voiced by guest stars -- such as Dylan Marron, who voices Carlos. The podcast typically airs on the first and fifteenth of every month, and consists of "news, announcements and advertisements" from the desert town, located "somewhere in the Southwestern United States." In an interview with NPR, Joseph Fink said that he "came up with this idea of a town in that desert where all conspiracy theories were real, and we would just go from there with that understood."

Who plays carlos in welcome to night vale? Let's have some stream of consciousness first.
To answer the question, consider the following: Cecil Gershwin Palmer -- the host, main character, and narrator -- is voiced by Cecil Baldwin, while secondary characters are sometimes voiced by guest stars -- such as Dylan Marron, who voices Carlos. So, the answer is Dylan Marron.