On a County Map is there a way to only show labels only if there is data?

[AndyNoble]

I have created a map and inserted counties from the package. The data I have is only for 17 Counties in the attribute table. There are a grand total of 46 counties in South Carolina. Is there a way to only show Labels where there is data attached? I don't want to see labels that have no data in the remaining 29 counties. Looks messy. Ideas?

[Robert_LeClair]

For the dataset, is there only 17 rows in the attribute table or 46?  If 46, you could create a label class to only label those features that meet a certain criteria.