According to Dynata data released in July of 2020, Nationally, about 59% of Americans report using masks always, 27% use masks sometimes, and 14% use masks never. This data set reports that mask usage was generally been increasing through the month of July. Mask usage varied by partisanship by about 20 points, with Democrats more likely than Republicans to report using a mask. This difference was still visible even when controlling for zip code and age. In this data set, party preference was the strongest predictive factor of mask usage.