|Full name||Mie Østergaard Nielsen|
|Born||25 September 1996|
|Height||1.84 m (6 ft 0 in)|
|Weight||67 kg (148 lb)|
|Club||Aalborg Swimming Club|
Nielsen won her first international senior medals at the 2011 European Short Course Swimming Championships, where she won four medals and was named newcomer of the championship.
She made her Olympics debut at the 2012 games where she was taking part in the 100 and 200 m backstroke and the 4×100 m relays in freestyle and medley.
At the 2016 Summer Olympics in Rio de Janeiro, she won a bronze medal as a part of the 4 × 100 m medley relay alongside Rikke Møller Pedersen, Jeanette Ottesen and Pernille Blume. Here they also broke the European record with a time of 3:55.01.
- Evans, Hilary; Gjerde, Arild; Heijmans, Jeroen; Mallon, Bill. "Mie Nielsen". Olympics at Sports-Reference.com. Sports Reference LLC.
- "Mie Nielsen". london2012.com. Retrieved 21 July 2012.
- "15th European Short Course Swimming Championships in Szczecin: Russia wins Championships Trophy – Spain celebrates Mireia Belmonte". len.eu. LEN. Retrieved 21 July 2012.
- Lord, Craig (19 May 2016). "Home-Alone Gold For Mie Nielsen 58.7CR Over Hosszu; & Bronze For Young Dawson". Swimvortex. Archived from the original on 20 May 2016. Retrieved 23 May 2016.