Ideal may refer to:

• Ideal (ethics), principles or values that one actively pursues as goals.
• Ideal (ring theory), in mathematics, special subsets of a ring considered in abstract algebra.
• Ideal (order theory), in mathematics, special kind of lower sets of an order.
• Ideal (band), late 1990s/2000s American R&B group.
• Ideal (German band), early 1980s German rock group.
• Ideal Toy Company, a now defunct toy company.
• IDEAL Scholars Fund, an American scholarship program for underrepresented students.
• iDEAL, a Dutch Internet payment method
• Ideals (magazine), a discontinued magazine that was published in the United States.
• Thought experiment, sometimes called an ideal experiment.
• Ideal (sitcom), a British sitcom
• Platonic ideal, a philosophical idea of trueness of form, associated with Plato

See also,

• Ideal gas law, in physics, governing the pressure of an ideal gas.
• Ideal chain, in science, the simplest model describing a polymer.
• Ideal transformer, an electrical transformer having zero resistance and perfect magnetic threading.
• Ideal final result, in TRIZ methodology, the best possible solution.
• Ideality, in phrenology, the disposition towards refinement and perfection.

Ideal | Ideal | Ideal | Idealo | Ideal | Ideał | Ideál | Ідеал