There are four theories about the origin of the name "Seeduwa": Duwa දූව pronounced [ðūvə]) meaning "island" is given to the village as it is surrounded by the river Dandugam Oya (Attanugalu Oya), as well as canals and paddy fields, giving Seeduwa an island-like appearance.

The first historical evidence of Seeduwa occurs in the era of King Bhuwanekabahu V, when this area was given to a chief named Simha.

[5] As Seeduwa is a village in the coastal area, which has been governed by the Portuguese, Dutch and English during their respective periods of control of the island, thus their influence is significant.

In 1890, a Roman Catholic church building was built in Seeduwa, for a congregation which had previously met in a small tent.

With the development occurred after establishment of open economy, this area became very significant as a result of the location in between the Investment Promotion Zone in Katunayake, and Ekala Industrial Estate.

Following the 2018 local government elections the Sri Lanka Podujana Peramuna hold the majority of the Council seats.

In the 19th century, the economy of Seeduwa was based on coconut and cinnamon production, as well as carpentry, in which the residents were employed in.

In 1890, a church was built and dedicated to Immaculata Virgin Mary, replacing a tent the congregation had met in previously.

Dencil De Silva, who led the Methodist council, opened a youth centre to people of any religion, easing some of the religious tension in the region.

Present day, the majority is Roman Catholic Population, alongside Buddhists, Methodists, and other Christians.

Most of the bus routes which start from Colombo or Ja-Ela and passing or destined to Negombo run through the border of Seeduwa.