Who sings the theme song at beginning of show in Creek?

The theme song for the show "Creek" is not sung by any particular artist. It's a instrumental piece composed specifically for the show.

It's likely that the music was composed by the show's composer or music supervisor.

If you are interested in finding out more about the specific music used in "Creek," you might be able to find the information on the show's official website or on music databases such as AllMusic.