József Ágoston Sir (born Schier; 28 April 1912 – 22 September 1996)[1] was a Hungarian sprinter.

He won three medals at the 1934 European Championships and was a four-time International University Games gold medallist.

[1][2] Sir won three gold medals at the 1935 International University Games in Budapest, running 10.8 and 21.6 for 100 and 200 metres and 41.6 with the Hungarian relay team.

[1][9] His best time for 100 metres was 10.4, which he ran in Berlin on 1 July 1934;[10] it was a Hungarian record, and remained so for more than thirty years.

[1] He proposed the IAAF Technical Aid Programme, which sought to develop the sport, and became its first director when it was approved.