Singular may refer to:

• Singular, the grammatical number that denotes a unit quantity, as opposed to the plural and other forms
• Singular or sounder, a group of boar, see List of animal names
• Singular (band), a Thai jazz pop duo
• Singular: Act I, a 2018 studio album by Sabrina Carpenter
• Singular: Act II, a 2019 studio album by Sabrina Carpenter

• Singular homology
• SINGULAR, an open source Computer Algebra System (CAS)
• Singular matrix, a matrix that is not invertible
• Singular measure, a measure or probability distribution whose support has zero Lebesgue (or other) measure
• Singular cardinal, an infinite cardinal number that is not a regular cardinal
• Singular point of a curve, in geometry

• Singularity (disambiguation)
• Singulair, Merck trademark for the drug Montelukast
• Cingular Wireless, a mobile network operator in North America