The 4th Iranian Congress of Community Oral Health was held on 28th and 29th of November 2019 in Mashhad, Iran under the theme of “Oral Health for All”. The congress brought together almost 300 Iranian dentists, including nearly 40 with a PhD in Community Oral Health, and 25 PhD students. This unprecedented large gathering of Iranian dentists, either specialists or dentists interested in community oral health, was one of the main characteristics of the meeting. Thirty lectures and 66 posters were presented. A highly appreciated part of the congress was the recorded videos of Dr. Marco Peres, Dr. David W. Chambers, and Dr. Linda Slack-smith. Dr. Peres gave an overview of the Lancet Oral Health Series, launched in July 2019. The videos were recorded, subtitled in Persian and worked perfectly instead of live video conferencing.