Is there an option to remove duplicate polygon labels in QGIS?

Question

I would like to know if there is an option in QGIS labeling engine which would remove all the duplicate labels.

My polygon layer contains a few features with same name. So when labeled it becomes a cluster which does not look good.

Answer 1

Check also if you are using the old labelling engine (the one still available in the vector properties) or if you are using the new labelling engine, available through a button in the toolbar (the icon has the letters "abc" underlined with a blue line). The new engine is much better than the old and there is more control on how/what labels draw.

Answer 2

For polygons, there is an option called "label every part of multi-part features" in advanced labeling settings. Consequently, it is possible to label only one part of a multi-part feature.

If I understand you correctly, your dataset contains multiple polygon features with same labels but the are NOT part of one multi-part feature.

Therefore, you'll have to merge these single-part features into multi-part features based on the label attribute: Vector - Geometry tools - Singleparts to multipart.