In the originally published version of “How to Poll Runoff Elections” by Peter Selb, Sascha Göbel, and Romain Lachat (Public Opinion Quarterly, Vol. 84, No 3, Fall 2020, pp. 776–787, https://doi.org/10.1093/poq/nfaa039), there was an error in Table 2. The value in the last row (Official), third column (Le Pen) appeared incorrectly as 10,443,245. The correct value is 10,638,475. This error has been corrected online.