Christopher Tye (c. 1505 – before 1573) was an English Renaissance composer and organist. Probably born in Cambridgeshire, he trained at the University of Cambridge and became the master of the choir at Ely Cathedral. He is noted as the music teacher of Edward VI and was held in high esteem for his choral music, as well as chamber works such as his 24 polyphonic In nomines. It is likely that only a small percentage of his compositional output survives, often only as fragments; his Acts of the Apostles was the only work to be published in his lifetime.

He ceased composing when he was ordained, returning to Ely Cathedral and later becoming rector of Doddington, Cambridgeshire. Today, he is perhaps best known for the hymn "Winchester Old", based on a theme from Acts of the Apostles, which forms the basis of the most commonly performed version in the United Kingdom of "While Shepherds Watched Their Flocks".

Little is known about Tye's origins. Cambridge University records for the academic year 1536–37 indicate that he received the degree of Bachelor of Music after "a study of ten years in the musical art"; from this it is supposed that Tye was born around 1505 (making him a direct contemporary of Thomas Tallis), probably in Cambridgeshire, where the family name was common and where Tye would go on to spend much of his career. For two terms in 1537 Tye is recorded among the lay clerks of the Choir of King's College, Cambridge; it was in 1536–37 that the so called "temporary" chapel (in use since the 1440s) collapsed, so Tye may well have been part of the first generation of lay clerks to sing in regular worship in the iconic King's College Chapel known today.

By 1543 Tye had taken up the position of Magister Choristarum (choirmaster) at Ely Cathedral. In 1545 the University of Cambridge awarded him the degree of Doctor of Music, and three years later the same honour was bestowed on him by the University of Oxford.

The composer's career shows that he had a strong connection to Richard Cox, who was a passionate church reformer and a tutor of King Edward (then Prince Edward). This affiliation would prove to have a strong influence on him for the rest of his life. Cox was also the person who very probably introduced Tye to the royal court. It is believed that this led to Christopher Tye being a kind of musical adviser of the court who worked closely with Edward. In 1605, Samuel Rowley (believed to be Tye's grandson) wrote a play entitled When You See Me You Know Me. In the play, Tye and King Edward play important roles and exchange dialogue where Edward identifies 'Doctor Tye' as 'Our music's lecturer.'

Later, in 1553, Tye published his rhymed scriptural paraphrase, The Actes of the Apostles. In it he takes the ideas set forth in the book of 'Acts' in the Bible and sets them to meter. Although it was met with divided reviews (even today), the work is hugely important because it is dedicated to Edward. In the preface he goes into some detail that implies a kind of friendship between the two. Although it is never mentioned explicitly, it is generally assumed that Tye held a position in the Chapel Royal staff during the 1550s at some point.

In 1558, Tye took up his posting again at Ely Cathedral, probably at the request of his old friend, Richard Cox. Soon, thereafter, Tye took it upon himself to take up a place in the ministry and thus ceased to compose music. Cox, who was Bishop of Ely during this time, ordained the composer as deacon in 1560 and later in the year as priest. Tye resigned from the post at Ely and was appointed to Doddington, Cambridgeshire, the richest benefice in England.^{[dubious – discuss]}

Tye is believed to have died at Doddington before March 1573 when his successor as rector was appointed, although no record is found of his death.