The district of Colombo was officially recorded in 2016 as having the highest income on average, per household.

Colombo District was part of the Low Country Sinhalese administration.

[6] At the time that Ceylon gained independence, Colombo was one of the two districts located in the Western Province.

Colombo District is located in the south west of Sri Lanka and has an area of 699 square kilometres (270 sq mi).

[1] Colombo District is divided into 13 Divisional Secretary's Division (DS Divisions), each headed by a Divisional Secretary (previously known as an Assistant Government Agent).