A blue hole is a submarine cave or sinkhole. It may also refer to:
Water-filled holes In the Bahamas Blue Holes National Park, Andros, which claims 22 blue holes Dean's Blue Hole, Long Island Far Side Blue Hole, also known as Magical Blue Hole, Abaco Islands Lost Reel Blue Hole, Abaco Islands Nancy’s Blue Hole, near Coopers Town, Abaco Watling's Blue Hole on San Salvador Island
In Belize Great Blue Hole on Lighthouse Reef Blue Hole National Park, inland near Belmopan, Cayo District
In the United States In Arkansas Blue Hole (Desha County, Arkansas), four lakes named Blue Hole in List of lakes in Desha County, Arkansas Blue Hole (Lafayette County, Arkansas), in List of lakes in Lafayette County, Arkansas Blue Hole (Lee County, Arkansas) in List of lakes in Lee County, Arkansas Blue Hole (Monroe County, Arkansas) in List of lakes in Monroe County, Arkansas
Elsewhere in the U.S. Blue Hole (Big Pine Key), an abandoned rock quarry in the Florida Keys Blue Hole (Guam), outside the entrance to Apra Harbor Blue Hole (Hawaii), also known as Wailua Headwaters, the start of the North Folk of the Wailua River at Mount Waialeale on Kauai, Hawaii Blue Hole (New Jersey) Blue Hole (New Mexico), a cenóte and popular altitude scuba diving site Blue Hole (Castalia), in Castalia, Ohio Blue Hole, the largest of the San Antonio Springs, Texas
Elsewhere
Blue Hole (Red Sea) in Egypt Blue Hole, associated with the Inland Sea, Gozo on Malta, Italy Blue Holes (Palau), north of Blue Corner, Palau Nanda Blue Hole, also known as Jackie's Blue Hole, on Espiritu Santo, Vanuatu Virgin Blue Hole, south of Blue Corner, Palau Yongle Blue Hole, also known as Dragon Hole, in the Paracel Islands, China Blue Holes (Saudi Arabia)
Other Bluehole, Inc. (formerly Bluehole Studio, Inc.), the developer of TERA, Devilian and PlayerUnknown's Battlegrounds. Bluehole Interactive, the former name of En Masse Entertainment. Bluehole, Kentucky, a postoffice Blue Hole, a manga series by Yukinobu Hoshino