Alona Volodymyrivna Bondarenko Dyachok (Ukrainian: Альона Володимирівна Бондаренко, born 13 August 1984) is a Ukrainian tennis player. She has a younger sister Kateryna Bondarenko who also plays on the Tour. She formerly paired with her older sister Valeria in doubles.

Her career high singles ranking was Number 19, achieved on 14 April 2008. She defeated former World No. 1 Jelena Janković in the third round of the 2010 Australian Open. She won the 2008 Australian Open women's doubles tournament with her sister Kateryna, beating Victoria Azarenka and Shahar Pe'er in the finals.