Con Cremin (6 December 1908 – April 1987) was an Irish diplomat born in Kenmare, County Kerry .
One of four children, Cremin was born to a family that operated a drapery business. His brother, Francis Cremin, became a leading academic canon lawyer who framed a number of key church documents. He was educated at St. Brendan's College, Killarney and from 1926 at University College Cork, where he graduated with a first-class degree in Classics and Commerce.
c.1929-30 he was awarded the post-graduate University College Cork Honan scholarship; by 1930 he had attained a degree in economics and accountancy. For the following three years he studied in Athens, Munich and Oxford, having attained a travelling scholarship in Classics. He subsequently entered the Department of External Affairs, having succeeded in the competition for third secretary in 1935.
In April 1935 he married Patricia O'Mahony. His first position in Dublin involved working with F.H. Boland on the League of Nations portfolio. In 1937 he was sent abroad on his first posting to Paris. There he worked under the 'Revolutionary Diplomat' Art O'Brien, until the latter retired in 1938. Sean Murphy later became his Minister. Ireland declared neutrality on the outbreak of the Second World War and Murphy and Cremin reported on the developments in France throughout the Phoney War.