---
title: "How to add cascading dropdowns"
slug: "how-to-add-cascading-dropdowns"
updated: 2026-04-27T19:59:49Z
published: 2026-04-27T19:59:49Z
canonical: "help.quickbase.com/how-to-add-cascading-dropdowns"
---

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

# How to add cascading dropdowns

You've learned how to create a simple conditional dropdown...but what if you wanted to take it one step further? What if you wanted to develop the form below?

![Employee form showing cascading dropdowns with fields for Country, City, and Department](https://cdn.document360.io/dd260e4e-10bb-4b66-8fb3-5504c272b904/Images/Documentation/4572884152084.png?sv=2026-02-06&spr=https&st=2026-10-15T04%3A52%3A52Z&se=2026-10-15T05%3A52%3A52Z&sr=c&sp=r&sig=DKOIzJqNsMo4DHL237B1eDO6nSm9H0YnIMnFZL70Tls%3D)

The good news is that, if you know how to set up a single conditional dropdown, you know how to set up cascading dropdowns.

## How to create cascading dropdowns

To add a conditional Departments field to your Employee form, follow the [tutorial for setting up a conditional dropdown](/v1/docs/conditional-dropdowns) and add these steps:

1. Add a Departments table.
2. Set up these relationships: ![Diagram showing table relationships between Employees, Countries, Cities, and Departments tables for cascading dropdowns](https://cdn.document360.io/dd260e4e-10bb-4b66-8fb3-5504c272b904/Images/Documentation/4572862107028.png?sv=2026-02-06&spr=https&st=2026-10-15T04%3A52%3A52Z&se=2026-10-15T05%3A52%3A52Z&sr=c&sp=r&sig=DKOIzJqNsMo4DHL237B1eDO6nSm9H0YnIMnFZL70Tls%3D) **Note**: These relationships will establish a conditional Department dropdown on the Employee form. You can also set up conditional behavior on the Departments form so that users can first choose a country to see a filtered list of cities. If you'd like to do that, follow the steps for creating a single conditional dropdown.
3. Set the Conditional values property for the Employees: Related Department field as follows: ![Conditional values property panel for the Employees: Related Department field showing the configuration](https://cdn.document360.io/dd260e4e-10bb-4b66-8fb3-5504c272b904/Images/Documentation/4572862136980.png?sv=2026-02-06&spr=https&st=2026-10-15T04%3A52%3A52Z&se=2026-10-15T05%3A52%3A52Z&sr=c&sp=r&sig=DKOIzJqNsMo4DHL237B1eDO6nSm9H0YnIMnFZL70Tls%3D)
4. Quickbase now filters the department list on the employee form, so that you see only those departments located in the selected city.