What is the name of the queen who reigned during most of Shakespeare's career? The queen was Elizabeth I.
Elizabeth I ruled England from 1558 until 1603, making her monarch during the emergence and flourishing of Shakespeare's professional career. London theatre expanded dramatically during her reign, and Shakespeare's acting company eventually became known as the Lord Chamberlain's Men, a company closely associated with the royal court.
Elizabethan theatre developed in a competitive commercial environment. Purpose-built playhouses, including The Theatre and the Globe, attracted large audiences, while royal performances gave acting companies prestige and protection. Shakespeare's early and middle-career works were written for this cultural world, even though he continued writing after Elizabeth's death.
A frequent confusion concerns James I, who succeeded Elizabeth in 1603 and reigned for the final decade or so of Shakespeare's career. Under James, Shakespeare's company became the King's Men, and plays such as Macbeth reflected new political and royal interests. Elizabeth I is nevertheless the single canonical answer because she presided over the larger formative period associated with Shakespeare's career and the Elizabethan stage.