Kapasia (Bengali: কাপাসিয়া) is an upazila (sub-district) of Gazipur District in central Bangladesh, part of the Dhaka Division.

[6][7] In the 16th century, Isa Khan and the Baro-Bhuiyans built up resistance in the modern-day Kapasia against Man Singh I, the Mughal governor of Bengal Subah, and a number of face-offs took place here.

During the Bangladesh Liberation War of 1971, the Pakistan Army sacked the entire marketplace in May and conducted mass killings across the village of Taragaon.

Sajjad of Taragaon was martyred and a monument for the freedom fighters was established in front of the Muktijoddha Sangsad premises.

Kapasia had a literacy rate (age 7 and over) of 56.29%, compared to the national average of 51.8%, and a sex ratio of 1063 females per 1000 males.

There has been an earlier project in Kapasia Upazila where the WorldFish Center with funding from the International Fund for Agricultural Development (IFAD) and the Danish International Development Agency (Danida), had researched on farming systems and had introduced adaptive integrated aquaculture practices.

[17] The Raniganj Neelkuthi (indigo-house), dating back to the 1800s, and the Dak Bungalow of Lakhpur are both examples of colonial-era architecture.

Other tourist sites include the Faqir Majnu Shah Bridge, Angona Amusement Centre and the home of Tajuddin Ahmad, first Prime Minister of Bangladesh, in Durdaria.