1638 in Ireland

• Monarch: Charles I ==Events==

• January 13 – proclamation enforcing the monopoly on tobacco held by the Lord Deputy of Ireland, Sir Thomas Wentworth. ==Arts and literature==

• January 1 – James Shirley's comedy The Royal Master is premiered at the Werburgh Street Theatre, Dublin. ==Births==

• Valentine Browne, 1st Viscount Kenmare, peer (d. 1694) ==Deaths==

• June 14 – Claud Hamilton, 2nd Baron Hamilton of Strabane (b. c.1606) ==References==