O'Loghlen is an Irish surname. Notable people with the surname include:
O'Loghlen baronets Sir Michael O'Loghlen, 1st Baronet (1789–1842) Sir Colman Michael O'Loghlen, 2nd Baronet (1819–1877) Sir Bryan O'Loghlen, 3rd Baronet (1828–1905) Sir Michael O'Loghlen, 4th Baronet (1866–1934) Peter O'Loghlen (1883–1971), Irish Fianna Fáil politician Peter O'Loghlen (1882–1923), Australian politician