Unitary may refer to:

• In automotive design, unitary construction is another common term for a unibody or monocoque construction
• In Christian doctrine, unitarianism is the belief in a "unitary God" as opposed to the concept of the Trinity.
  • Unitarian Universalism (sometimes called "Unitarianism") is an interfaith church which draws its name from an interfaith concept of "unitary God" (as opposed to an exclusively Christian concept)
• Unitary state and Unitary authority - types of political regions
• Unitary enterprise - Type of Government owned corporation in Russia and Belarus
• Promoters of unitary executive theory call themselves "unitarians".

In mathematics, see:

• Unitary matrix,
• Unitary operator,
• Unitary transformation,
• Unitary group,
• Unitary representation,
• Note: Some authors use the word "unitary" synonymously with unital

For the role played by the mathematical concept of unitarity in physics, see:

• Unitarity (physics).

es:Unitario fr:Unitaire