If we look at union membership (which is different than being covered by collective bargaining agreements), the US (10%) has a lower union density than Switzerl

If we look at union membership (which is different than being covered by collective bargaining agreements), the US (10%) has a lower union density than Switzerland (17%) and about the same than France (8% or 10%). See https://stats.oecd.org/Index.aspx?DataSetCode=TUD https://stats.oecd.org/Index.aspx?DataSetCode=TUD