Cyprian Lucar (1544–1611) was an English mechanician and author.
He was born in London in 1544. His grandfather was John Lucar of Bridgwater, Somerset. His father, Emanuel Lucar,was a member of the Merchant Taylors' Company.
He was admitted as a scholar of Winchester College in 1555, and became fellow of New College, Oxford, before 1564. In 1568 he entered Lincoln's Inn.
His most well known works are: