Cotabato's 3rd congressional district is one of the three congressional districts of the Philippines in the province of Cotabato.

[3] The district covers central and southern Cotabato bordering Maguindanao to the west and Lanao del Sur to the north.

It consists of the municipalities of Banisilan, Carmen, Kabacan, M'lang, Matalam and Tulunan.

[4] The district contains several exclaves of the Bangsamoro autonomous region.

It is currently represented in the 19th Congress by Samantha Santos of the Lakas-CMD.