Sanmania is a union under Kapasia Upazila of Gazipur District with a total area of 23.047 square kilometers. The total population of the union is 29,996 among them 14,884 are male and 15,112 are female.

Map of Sanmania of Gazipur District.

Map of Sanmania of Kapasia Upazila.
Map Courtesy: The Bangladesh Network.