Açude Tucunduba is a reservoir in the state of Ceará, Brazil, built on the course of the Rio Tucunduba along the boundary between the municipalities of Senador Sá and Marco. Constructed by DNOCS (the federal agency responsible for water infrastructure in northeastern Brazil), the reservoir was completed in 1919, making it one of the older water infrastructure projects in the region. It has a total storage capacity of 40.2 million cubic meters and a regulated flow of 1.14 m³/s. The reservoir covers approximately 3.4 square miles of surface area.

The communities of Serrota (a district of Senador Sá) and Panacuí (a district of Marco) are situated on the reservoir's margins, and the reservoir takes its name from the district of Tucunduba located nearby. The presence of these communities along the shoreline gives the water body a lived-in, working character, and locals have historically relied on it as a source of livelihood.

Canoeing is an established activity on the reservoir. A canoe race is held annually in July, which represents one of the more festive events associated with the açude and suggests that July is at minimum a viable paddling period. No formal boat ramps or designated access points have been documented for the site, so paddlers should plan accordingly and verify local access conditions before visiting.

Water quality, water temperature patterns, wildlife, and formal paddling regulations for this reservoir are not well documented. Paddlers should contact local authorities or DNOCS for current rules and access permissions before planning a trip.