Unitary may be:

• Unitary construction, in automotive design, another common term for a unibody or monocoque construction
  • Unitary as chemical weapons opposite of Binary
• Unitarianism, in Christian religion, the belief in a "unitary God" instead of the idea of the Trinity
  • Unitarian Universalism (sometimes called "Unitarianism"), an interfaith church which gets its name from an interfaith concept of "unitary God"
• types of political regions
  • Unitary state
  • Unitary authority
• Unitary enterprise, a type of government-owned corporation in Russia and Belarus
• Unitary executive theory, a theory of American constitutional law