Nándor János Dáni (; 2 July 1871 – 30 December 1948) was a Hungarian athlete. Domestically, he represented multiple sports clubs in multiple sports such as athletics, cycling, and speed skating. During his career, he set two national records in athletics, one in the 100 yards and the other in the 880 yards.

Later on, he was selected to compete for Hungary at the 1896 Summer Olympics. He was entered in four events, but only competed in the men's 800 metres. There, he earned the silver medal with a time of 2:11.8, earning Hungary's first Olympic medal. Later on, he was elected a member of the Hungarian Athletics Association and became the chairman of a carbonic acid factory.

Biography

Nándor János Dáni was born on 2 July 1871 in Budapest, Austria-Hungary. Later, he represented multiple sports clubs, including Magyar Atlétikai Club (MAC) in athletics and cycling, Neptun Evezős Egyesület in rowing, and Budapesti Korcsolyázó Egylet in speed skating. As a cyclist, he won two editions of a road race competition in 1891 and 1892. As a speed skater, he won a competition in 1893. He fully transitioned to practicing athletics upon the end of his cycling career. There, he was entered in the men's 100 metres, 400 metres, 1500 metres, and long jump, but did not compete in any of the four events. He only competed in the men's 800 metres. His silver medal win earned for Hungary its first Olympic medal.

After his career in sport, he was elected a member of the Hungarian Athletics Association. He also became the director and then chairman of a carbonic acid factory. Dáni died on 30 December 1948 in Budapest.