Surrogate (from Lat. surrogare, to substitute for) may refer to:

• Surrogate (clergy), a deputy of a bishop or ecclesiastical judge.
• Surrogate pregnancy, an arrangement for a woman to carry and give birth to a child who will be raised by others.
• Surrogate marriage, a custom in African culture.
• Sex surrogate, in sexual therapy
• Author surrogate or audience surrogate, reciprocal literary techniques.
• Surrogate endpoint, a measure of effect in clinical trials.
• Surrogate key, a primary key generated by the relational database management system.