Dorota Niedziela, née Siwiec (born August 20, 1964, in Oświęcim) is a Polish politician and veterinarian.

She began her professional career as a veterinarian and became a co-owner of veterinary clinics in Kęty and Bielsko-Biała.

She was appointed to the board of the Silesian Veterinary Polyclinic in 2006 and became the Secretary of the Polish Association of Veterinarians in 2010[1].

In the 2011 parliamentary elections, she won a seat in the Sejm on the Civic Platform list, receiving 6,166 votes in the Chrzanów constituency[4].

Her husband was Marcin Niedziela, the Oświęcim county mayor and a politician from the Civic Platform, who passed away in 2021[11].