The Tony Award for Best Featured Actor in a Play is an honor presented at the Tony Awards, a ceremony established in 1947 as the Antoinette Perry Awards for Excellence in Theatre, to actors for quality supporting roles in a Broadway play. Honors in several categories are presented at the ceremony annually by the Tony Award Productions, a joint venture of The Broadway League and the American Theatre Wing, to "honor the best performances and stage productions of the previous year."

The Antoinette Perry Award for Excellence in Broadway Theatre, more commonly known as the Tony Award, recognizes excellence in live Broadway theatre. The awards are presented by the American Theatre Wing and The Broadway League at an annual ceremony in Manhattan. The ceremony is usually held on the second Sunday of June.