Dagmar Pecková (born 4 April 1961) is a Czech operatic mezzo-soprano.

Born in the Medlešice district of Chrudim, Pecková studied singing at the Prague Conservatory.

In 2000 she portrayed the role of the Pilgrim in the world premiere of Kaija Saariaho's L'amour de loin at the Salzburg Festival.

She has made a number of recordings on the Supraphon label, including a disc of Mozart arias, a disc of songs by Mahler and Berio, and a complete recording of the role of Varvara in Leoš Janáček's Káťa Kabanová.

She currently lives in Heuweiler, Germany with her husband Klaus Schiesser, a German musician.