Webflow does not natively support dynamically populating form select fields with CMS data, and there is no built-in way to do this without custom code or third-party tools.
While you can't achieve this directly in the Designer, you can use native Webflow elements and custom JavaScript (added inside the project) to simulate this behavior:
display: none or placing it inside a hidden container).<select> field with them.
<div> or <span> containing the needed value (e.g., city name)..cms-option)..cms-option items.<option> elements to your target <select>.
This method uses Webflow-only tools (plus JS) and avoids third-party integration but still requires script logic for functionality.
Webflow doesn’t allow CMS data in form select fields natively, but you can use hidden Collection Lists + custom JavaScript—within Webflow itself—to simulate dynamic dropdowns without third-party tools.