2.3.1 Different types of EAs
For Census purposes EAs are divided into three main types:

• Urban EAs - these are mainly built up areas.
• Rural EAs - these are mainly rural in character.
• Mixed urban/rural - these are for the most part rural EAs, which include all or part of a small town or village.

2.3.2 Geography definitions
County: For census purposes the country is divided into 34 administrative counties. Each county is identified by a unique two digit code e.g. 01 identifies County Carlow.
Electoral Division (ED): The smallest legally defined administrative area in the State and also the smallest area for which detailed census results are published. The boundaries of Electoral Divisions are displayed in RED on maps. Each Electoral Division is uniquely identified within a county using a three digit numeric code e.g. 009 identifies the ED of Castle B in Limerick City.

Townland: The smallest territorial division identified and used for census enumeration purposes in rural areas and each townland is identified by a unique 5 digit code. The boundaries of townlands are displayed in BLUE on rural maps. A townland may be split into urban and rural parts. This occurs when an urban area, a town or village, divides a townland into two or more parts. On the Form C (see 2.3.3 for more detail) these are listed separately under the urban and rural parts of the EA/ED and are distinguished by (PT) after the townland name. These parts are identified by the same townland code in all cases.

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Street: A group of adjacent buildings (e.g. houses, shops or businesses) having the same location address within a built-up area. Each street within a town is uniquely identified by a 5 digit code. In cities and large towns a street may span more than one EA or ED. In such cases the street always uses the same Street Code.

Cities/towns: For census purposes towns fall into two types:

• Towns with legally defined boundaries are marked in green on enumeration maps and must be strictly observed during the course of the enumeration. CSO extensions to legally defined towns are marked in pink on enumeration maps.
• Towns without legally defined boundaries, i.e. Census Towns are defined as a cluster of 50 or more occupied dwellings, not having a legally defined boundary. The boundaries of census towns and the environs of legal towns are denoted in pink on the maps.