# Campaign

Campaigns are used to track where contacts and leads originate from

| Name         | Type                                           | Description                         |
| ------------ | ---------------------------------------------- | ----------------------------------- |
| code         | String                                         | Human-readable, unique reference    |
| contactCount | Int                                            | Number of contacts in this campaign |
| endDate      | ISO8601Date                                    | End date of campaign                |
| id           | ID                                             | Unique identifier for the campaign  |
| leadCount    | Int                                            | Number of leads in this campaign    |
| name         | String                                         | Campaign name                       |
| owner        | [User](/developer/api-reference/types/user.md) | Campaign owner                      |
| ownerUserId  | ID                                             | ID of the user owning this campaign |
| startDate    | ISO8601Date                                    | Start date of campaign              |


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