---
title: "List Concat Step"
slug: "list-concat-step"
tags: ["Lists", "concatenate"]
updated: 2025-07-09T18:31:24Z
published: 2025-07-09T18:31:24Z
canonical: "documentation.decisions.com/list-concat-step"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://documentation.decisions.com/llms.txt
> Use this file to discover all available pages before exploring further.

# List Concat Step

| ## Step Details |
| --- |
| **Introduced in Version** | 4.0.0 |
| **Last Modified in Version** | 5.0.0 |
| **Location** | Data > List |

The **List Concat** step combines two specified lists.

---

## Properties

#### Inputs

| Property | Description | Data Type |
| --- | --- | --- |
| List1 | List of String items | List of String |
| List2 | List of String items | List of String |

#### Outputs

| Property | Description | Data Type |
| --- | --- | --- |
| Output | Outputs the combined list | List of String |

#### ![](https://cdn.document360.io/6ef8bcc1-6489-4486-9ad1-83acff7e5df0/Images/Documentation/image-1667935143414.png)

---

Related Information

Forum Posts: [Concatenate List Without Separator](https://community.decisions.com/discussion/3042/concatenate-list-without-separator) [Concatenate With Separators](https://community.decisions.com/discussion/617/concatenate-list-with-separator)

## Related

- [List Mapping Step](/list-mapping-step.md)
- [List to CSV Mapping](/list-to-csv-mapping-step.md)
- [String List Does Not Contain Steps](/string-list-does-not-contain-steps.md)
- [String List Contains Any](/string-list-contains-any.md)
- [Is List Empty](/is-list-empty.md)