This article critically reviews and meta-analyzes the environmental performance of family firms. Using a sample of 40,910 firms covering a 12-year period, we conclude that the average effect of family involvement on environmental performance is negative, albeit small. This negative effect is more pronounced in primary studies that measure environmental performance via the environmental operational practices adopted and in those that define family business using the family ownership and management criteria. Our findings suggest that from an agency perspective, and compared with nonfamily firms, the negative view of the environmental performance of family firms prevails over the positive view.