Triangle K is a kosher certification agency under the leadership of Rabbi Aryeh R. Ralbag.

It was founded by his late father, Rabbi Yehosef Ralbag.

[1] The hechsher is a letter K enclosed in an equilateral triangle.

They supervise a number of major brands, including Del Monte, Hebrew National,[2] Ocean Spray, Sunsweet, Sunny Delight, SunChips and Wonder Bread.

[3] Minute Maid products used to be supervised by Triangle K.[4] Since 2013, the Orthodox Union has been providing kosher certification for Minute Maid products instead.