O'Gara regained the fly-half spot in Ireland's opening 2010 Six Nations Championship games against Italy and France, but was back on the bench for the remaining three games. He had a 100% kicking record for the 2010 Six Nations. O'Gara was selected in Ireland's squad for their 2010 Summer Tour to New Zealand and Australia, and started against New Zealand, converting 3 tries, but was on the bench for the Australia test. O'Gara became the third Irishman to win 100 caps when he came off the bench during Ireland's first 2010 Autumn Series test against South Africa. He started against Samoa and scored 15 points, including a try. He came off the bench against New Zealand and Argentina.