Adrianus Cornelis "Aad" de Jong (1 December 1921 – 29 August 2003) was a Dutch footballer.^[1] He played for ADO Den Haag and five times in the Netherlands national football team.

De Jong became a member of ADO at the age of eight; At 16, he first appeared in stadium Elf der Haager.^[2] Twice in a row, 1942 and 1943, this team was the Dutch champion, alongside the left defender as de Jong, including Gerrit Vreeken, Herman Choufoer (as team captain) and André Roosenburg, and later ADO coach and football champion Rinus Loof.^[3] He remained faithful to the ADO for 18 seasons and the club appointed him as an honorary member. After finishing his active career, he worked as a trainer at HBS Craeyenhout and Quick (H).

Just three weeks before his 29th birthday, de Jong made his debut in the Oranje Elftal^[4] - at times when many of his teammates such as Vreeken, Bram Appel, Theo Timmermans and Toon Bauman had already gone to France as professionals or were on the go. The Dutch defensive line on 12 November 1950 - with de Jong, Sjef Mertens (in his only international match) and Jan van Schijndel - allowed in this game, however, goalkeeper Piet Kraak had to seize seven times. The score against Belgium was 2:7 in Antwerp against Belgium. A 2:5 defeat against France was followed again by a 5:4 against Belgium. At two more defeats, de Jong was in the Oranje cover, and a few more times he was sitting on the bench as a substitute. In his last game, again in Belgium in April 1952, the later Belgian national teammate Guy Thys was his direct opponent.