Colombo postal codes

Colombo's postal code system divides Sri Lanka's commercial capital into clearly defined zones, making it easier to navigate addresses, send mail, and understand the city's geography. Whether you are booking accommodation, arranging a delivery, or simply orienting yourself before a visit, knowing which code belongs to which neighbourhood saves time and confusion.

How Are Colombo's Postal Codes Structured?

The city is divided into 15 main postal zones, labelled Colombo 01 through Colombo 15. Each zone carries a five-digit postal code running from 00100 (Colombo 01) to 01500 (Colombo 15). The numbering follows a broadly west-to-east and north-to-south pattern, though the zones are administrative rather than strictly geographic in shape.

Outer suburbs that have grown around the city core use codes that typically begin with "10" or "11", distinguishing them clearly from the inner zones. This separation reflects Colombo's expansion over the decades as residential and commercial development spread well beyond the original city limits.

What Are the 15 Main Colombo City Zones?

The table below lists every zone with its corresponding postal code and the neighbourhood most commonly associated with it. Note that some zones cover more than one area; the name given is the primary or best-known locality.

Which Neighbourhoods Sit in Each Zone?

Colombo 01 (Fort, 00100) is the historic commercial and administrative heart of the city. Banks, government ministries, the main railway station, and the iconic Colombo Lotus Tower are concentrated here or immediately adjacent. Most international business addresses use this code.

Colombo 03 (Colpetty, 00300) is a dense mixed zone of embassies, hotels, restaurants, and apartment towers along Galle Road. It borders the Indian Ocean and is one of the most sought-after residential addresses in the country.

Colombo 07 (Cinnamon Gardens, 00700) covers the leafy, low-density residential quarter that contains Viharamahadevi Park, the National Museum, and several top-tier schools. Wide tree-lined streets and colonial bungalows define its character.

Colombo 11 (Pettah, 01100) is Colombo's busiest wholesale trading district, a grid of narrow streets packed with fabric merchants, spice vendors, and electronic goods importers. It borders the Fort zone and the main bus terminus.

What Postal Codes Cover Colombo's Outer Suburbs?

As Colombo expanded, dozens of satellite towns and municipalities developed their own postal identities. These outer-suburb codes are essential for courier services, government correspondence, and property records. The table below covers the most commonly referenced localities.

Battaramulla (10120) is particularly notable as the location of several government ministry complexes. Dehiwala (10350) merges southward with Mount Lavinia and is a major residential corridor along the southern coastal road. Avissawella (10700), further inland, marks the eastern edge of the Greater Colombo catchment area.

How Do Postal Codes Help Travellers Visiting Colombo?

Visitors booking hotels, arranging airport transfers, or using ride-hailing apps will frequently be asked for a postal code at checkout or on booking forms. Using the correct code ensures that confirmation letters and documents reach the right address and that navigation apps plot the correct district.

A Colombo city tour typically starts in Colombo 01 (Fort), moves through Colombo 11 (Pettah) for its bustling markets, continues south through Colombo 03 and 04 for the seafront, and ends in Colombo 07 for the museum quarter. Knowing the zone numbers gives you an immediate sense of how far apart different stops are.

For longer stays or villa rentals in the outer suburbs, codes in the 10100–10400 range generally indicate areas within 15–20 km of the city centre, while codes above 10600 suggest a 30-minute or longer drive depending on traffic conditions.

Are There Postal Codes for Areas Beyond Greater Colombo?

Sri Lanka's postal system extends nationwide. Codes beginning with "2" cover the Western Province outside Colombo district, while other prefixes correspond to different provinces and districts across the island. For addresses in other major cities, the relevant city postal directories are maintained by Sri Lanka Post, the state postal authority.

Within the Colombo District, codes starting with "10" and "11" cover the full range of outer suburbs, from the residential towns south of the city like Moratuwa to the eastern commuter belt around Malabe and Kaduwela. These boundaries shift periodically as new administrative divisions are gazetted, so it is advisable to confirm a specific code against the latest Sri Lanka Post directory for official correspondence.