Malgorzata Holub-Kowalik (Polish pronunciation: [maw.g?'?a.ta 'x?.wup k?'va.lik]; born 30 October 1992) is a Polish sprinter specialising in the 400 metres.
She represented her country at two outdoor and two indoor World Championships winning a silver medal in the relay at the 2016 IAAF World Indoor Championships.
Her personal bests in the event are 51.74 seconds outdoors (Beijing 2015) and 52.60 seconds indoors (Torun 2017).