Oyebanjo represented the Republic of Ireland at under-19 level, making his debut in a 1–0 defeat to Portugal in the Under-19 Midlands International Tournament on 18 August 2008. He appeared in their two remaining matches at the tournament, a 1–0 defeat to Ukraine on 19 August 2008 and a 2–0 loss to Spain on 21 August. He appeared in three 2009 UEFA European Under-19 Championship qualification matches in November 2008, including victories over Malta and Liechtenstein and a defeat to France. Oyebanjo featured in their three 2009 UEFA European Under-19 Championship elite qualification matches in June 2009. The matches against Belgium and Switzerland resulted in defeat, but when Oyebanjo captained the Republic of Ireland against Sweden, the team recorded a 2–1 victory. He finished his under-19 career with nine caps and in August 2010 was named the FAI Under-19 International Player of the Year. He made his under-21 debut as an 84th-minute substitute in a 1–1 draw away to Georgia on 14 November 2009 in a 2011 UEFA European Under-21 Championship qualification Group 2 match. Three days later, he started the Republic of Ireland's 1–1 away draw against Armenia in the same competition. Having been an unused substitute against Armenia on 3 March 2010, he entered a 5–0 home qualification win over Estonia on 10 August as an 87th-minute substitute. Oyebanjo was on the bench for the Republic of Ireland's opening 2013 UEFA European Under-21 Championship qualification Group 7 match against Hungary on 1 September 2011 before starting their 1–0 defeat away to Turkey on 6 September. He was capped six times by the Republic of Ireland at under-21 level. Oyebanjo primarily plays at right back but is capable of playing at centre back. York City  Individual