Blue star or bluestar may refer to:
O-type star (a.k.a. blue star), a stellar classification
Animals Linckia laevigata, a sea star from the Indian and West Pacific Oceans Phataria unifascialis, a sea star from the East Pacific
Businesses Blue Star (company), an Indian Air conditioning company Blue Star Donuts, an American chain of gourmet donut shops Blue Star Ferries, a Greek ferry company Blue Star Infotech, Indian company Blue Star Line, a former British shipping company Blue Star Productions, a publishing imprint and a division of Book World, Inc Bluestar (bus company), based in Southampton, England Blue star (Indonesian bus company), based in Salatiga, Central Java, Indonesia Bluestar Company, a predecessor of ChemChina
Military Operation Blue Star, a 1984 Indian military operation Blue stars used on service flags denote a United States service member fighting in a war Blue Star Memorial Highway, a system of highway markers honoring veterans Blue Star Mothers Club, a non-profit military support group
Music "Blue Star" (song), first recorded 1955 Blue Star, an album by Levinhurst
Plants Amsonia, plant species also named "bluestar" Hubricht's Bluestar (Amsonia hubrichtii), plant Isotoma axillaris
Others The Blue Star (novel), a 1952 fantasy novel by Fletcher Pratt The Blue Star (film), a 2023 Spanish-Argentine drama film Newcastle Blue Star F.C., English association football team Blue star, the logo of Newcastle Brown Ale BlueStar PR, Jewish political organization Tesla BlueStar, code name for the Tesla Model 3 electric car Blue Star Wicca, a sect of traditionalist witches Blue Star, a nickname for the United States business band frequency of 467.925 MHz Blue Star (SLV), satellite launcher Blue star tattoo legend Blue Star, a type of Multiple working system used on British locomotives Blue Star Kachina, a legendary spirit Blue Star (film), a 2024 Tamil sports film
See also Blue Stars (disambiguation) Blue (disambiguation) Star (disambiguation) Blue giant (disambiguation) Blue main-sequence star (disambiguation) Blue dwarf (disambiguation) Blue subdwarf (disambiguation) Blue Planet (disambiguation) Blue world (disambiguation)