Donald D. Chamberlin is an American computer scientist who is one of the principal designers of the original SQL language specification with Raymond Boyce.

Chamberlin was elected a member of the National Academy of Engineering in 1997 for contributions to the SQL database query language.

[2] In 2000, jointly with Jonathan Robie and Daniela Florescu, he drafted a proposal for an XML query language called Quilt.

[2] In 2009, he was made a Fellow of the Computer History Museum "for his fundamental work on structured query language (SQL) and database architectures.

He has also contributed problems and served as a judge for the ACM International Collegiate Programming Contest for seventeen consecutive years (1998–2014).