Blue Diamond may refer to:

• A blue diamond, the most famous example being the Hope Diamond
• The Blue Diamond, the name assigned in 1954 to the air demonstration unit of the Philippine Air Force. In 1960, this was changed to The Blue Diamonds.
• Blue Diamond, Nevada, a census-designated place (CDP) in Clark County, Nevada, United States
• Blue Diamond Growers, a California-based agricultural cooperative and marketing organization that specializes in almonds
• The Blue Diamond (comics), a 1940s superhero from Timely Comics, a forerunner of Marvel Comics
• Impatiens namchabarwensis or Blue Diamond Impatiens, a member of the Balsaminaceae family
• The Heart of the Ocean, an important element in the 1997 Titanic film.
• Blue Diamond (truck platform), a collaborative agreement between Ford Trucks and Navistar International (previously IHC)
• A Viagra tablet (informal)

Blue Diamonds may refer to:

• Blue Diamonds, a Dutch 1960s doo-wop duo best known for their chart-topping single “Ramona”
• “Blue Diamonds”, a song from Rusted Root’s 2002 album Welcome to My Party
• “Blue Diamonds”, No. 92 Squadron RAF aerobatic display team.
• “Blue Diamonds”, a song from The Long Winters’ 2003 album When I Pretend to Fall