Natalia Dominiak (born 30 January 1998) is a Polish modern pentathlete and U24 European Champion (2017).

Her first major success was winning the individual silver medal at the Junior European Championships in Prague in 2015.

During the Youth European Championships in Drzonków, she won a bronze medal in the mixed relay with Daniel Ławrynowicz.

That same year, at the inaugural U24 European Championships in Drzonków, she won the individual competition and, with Marta Kobecka and Dominika Karolak, took second place in the team event.

There, she finished 21st individually and won a bronze medal in the team event with Oktawia Nowacka and Anna Maliszewska.