Nicholson represented Northern Ireland at international level. He represented his country at each level earning three caps for the Schoolboys, as well as playing twice for
Northern Ireland U23 and four caps for
Northern Ireland B. He also appeared for Northern Ireland at full international level, appearing 41 times for
Northern Ireland, scoring six goals. Over an 11-year international career from 1960 to 1971 making him the most capped player internationally for Huddersfield Town. ==Death==