NuFact 2021 is the twentysecond in the series of yearly international workshops which started in 1999.  The main goal of the workshop is to review the progress of current and future facilities able to improve on measurements of the properties of neutral and charged lepton flavor violation, as well as searches for new phenomena beyond the capabilities of presently planned experiments. A special session on Diversity, Outreach & Education will also be held as well as a poster session.   For the...