Aleksandra Jadwiga Klejnowska-Krzywanska (born 17 December 1982 in Legnica) is a Polish weightlifter.

[2][3] On 11 April 2002 Aleksandra Klejnowska and Dominika Misterska failed a drug test carried out in training by the World Anti-Doping Agency.

Both appealed, but the IWF Executive Board, decided on 17 November 2002 to suspend them for two years, even though there was evidence from the National Public Prosecutor's Office that the material was not doping.

[6] She won a silver medal during the 2005 European Weightlifting Championships, and ranked second in the 58 kg category.

Klejnowska competed in the Women's 58 kg at the 2005 World Championships in Doha, Qatar but finished un-ranked because she missed all of her three snatch attempts.