The SEKA Paper Museum, a.k.a. SEKA Mehmet Ali Kağıtçı Paper Museum, is a museum of industrial heritage in Kocaeli district, northwestern Turkey. Situated in a former pulp and paper mill, it is dedicated to papermaking in Turkey. The museum was opened in 2016.

Construction of the pulp and paper mill began with groundbreaking on August 18, 1934. The mill was built as part of the industrialization efforts during the early years of modern Turkey. The first domestic paper was produced on April 18, 1936.

Exactly 80 years after its establishment, the mill was redeveloped into a museum by the Metropolitan Municipality of Kocaeli on November 6, 2016. It is the country's first, and the world's largest, paper museum, and it is named after the founder of the mill, Mehmet Ali Kağıtçı. The museum consists of 16 halls in a four-story building, constructed on an area of 12,345 m2 (132,880 sq ft). The museum contains 115 displays containing 443 documents, 337 objects and many photos, painstakingly selected from tens of thousands.

In a hall in the building's basement, the social life at the SEKA mill is narrated. The ground floor contains a lobby, turbine room, power plant, rooms for grinding, stock preparation, and cleaning, paper machine hall, Mehmed Ali Kâğıtçı Memorial Hall, temporary exhibition hall and greenhouse for plants used in papermaking. The two halls of the first floor are for pulp preparation and printing. On the second floor, there are two halls for high-density pulp towers and a screen room. A cloakroom, gift shops, cafeteria and restaurant are found in the entrance section of the museum.