Albert Holden Illingworth, 1st Baron Illingworth, PC, was a British businessman and Liberal politician. He served as Postmaster General between 1916 and 1921 in David Lloyd George's coalition government.

Postmaster General of the United Kingdom was a Cabinet ministerial position in HM Government. Aside from maintaining the postal system, the Telegraph Act 1868 established the Postmaster General's right to exclusively maintain electric telegraphs. This would subsequently extend to telecommunications and broadcasting.