Add a prefix to values in a field in ArcGIS Pro

Summary

In ArcGIS Pro, a prefix can be added to values in a field. For example, a state prefix can be added to a field containing the names of cities in the attribute table, as shown in the image below. This article provides the workflows.

Procedure

Add a user-defined prefix using the Calculate Field tool in the attribute table

Note:
This option is only applicable when adding prefixes to a text field type.

1. Open the project in ArcGIS Pro.
2. In the Contents pane, right-click the layer and click Attribute Table.
3. In the attribute table, right-click the field and click Calculate Field.

4. In the Calculate Field window, depending on the Expression Type, enter the following expression in the expression box:

• For Python 3

"<the prefix>" + " " + !<field name>!

• For Arcade

"<the prefix>" + " " + $feature.<field name>

Note:
Omit " " in the expression to remove the space separator between the prefix and the field values.

5. Click Apply and click OK. The prefix is added to the values in the field as defined by the expression.

The image below shows the ‘SC’ (South California) state prefix added to the City field values.

Add a prefix using an existing field from the attribute table

If the attribute table has an existing field to be used for the prefix, concatenate the two fields with a space separator. Refer to ArcGIS Pro: Code samples–strings for more information.