Kolatia Union is a union located in Keraniganj Upazila, which is a sub-district of Dhaka District in Bangladesh. Dhaka is the capital city of Bangladesh and is divided into several administrative units known as upazilas, with Keraniganj being one of them.

Unions are the smallest administrative units in Bangladesh, and Kolatia Union is one of the many unions within Keraniganj Upazila. Each union is headed by a chairman and has a number of elected members who govern and manage local affairs such as maintaining law and order, infrastructure development, and public services.