Tabetha Suzanne Boyajian (born c. 1980) is an American astronomer on faculty at Louisiana State University. She was a post-doctoral fellow 2012–16 at Yale University, working with Debra Fischer. Boyajian is active in the astronomical fields of stellar interferometry, stellar spectroscopy, exoplanet research, and high angular resolution astronomy, all particularly at optical and infrared wavelengths. She is the lead author of the September 2015 paper Where's the Flux? which investigates the highly unusual light curve of KIC 8462852; the star has been colloquially named Tabby's Star in her honor.