A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
There is a limit. See info below from Debra Dalgleish and the link to the sample file.
Item Limit in Drop Down List
There are limits to the number of items that will show in a data validation drop down list:
- The list can show up to show 32,767 items from a list on the worksheet.
- If you type the items into the data validation dialog box (a delimited list), the limit is 256 characters, including the separators.
If you need more items than that, you could create a dependent drop down list, broken down by category. There is a sample file here: Dependent Drop Down from Sorted List
Gord