| 6th May | Missing Maps DRK Online Mapathon - Einführung JOSM |
| 6th May | Dresdner OSM-Stammtisch | Dresden, Saxony, Germany |
| 7th May | OSM Africa Monthly Mapathon: Map Zambia |
| 7th May | C&H Mapping #6: Mapping accessibility with JOSM and Mapillary |
| 7th May | Virtual meeting of the Polish OSM Association | Cudniki, Łódź Voivodeship, Poland |
| 8th May | Resolución de Notas de Bogotá | Bogota, Colombia |
| 10th May | OSM x Wikidata Taipei #28 | Huashan, Taipei, Taiwan |
| 11th May | OSM-Treffen Zürich | Zurich, Zurich, Switzerland |
| 11th May | Hamburger Mappertreffen | Hamburg, Germany |
| 11th May | OSM Duma: OSM Tasking Manager repartitioning of Budapest ortophotography, improving on example landing page (online) | Gárdony, Hungary |
| 12th May | Stammtisch Köln | Cologne, North Rhine-Westphalia, Germany |
| 12th May | OpenStreetMap Michigan Meetup | Michigan, United States |
| 12th May | OpenStreetMap U.S. Virtual Mappy Hour | Kansas, United States |
| 13th May | 155. Berlin-Brandenburg OpenStreetMap Stammtisch (Online) | Berlin, Berlin, Germany |
| 14th May | Virtual meeting of the Polish OSM Association | Cudniki, Łódź Voivodeship, Poland |
| 15th May | Resolución de Notas de Bogotá | Bogota, Colombia |
| 17th May | OSM Duma: interactive discussion (topic to be determined, online) | Gárdony, Hungary |
| 18th May | 139. Treffen des OSM-Stammtisches Bonn |
| 18th May | OSM-Verkehrswende #23 (Online) | Berlin, Berlin, Germany |
| 18th May | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 20th–22nd May | Mapping USA | Kansas, United States |
| 20th May | Missing Maps DRK Online Mapathon |
| 21st May | Virtual meeting of the Polish OSM Association | Cudniki, Łódź Voivodeship, Poland |
| 24th May | Bremer Mappertreffen (Online) | Bremen, Free Hanseatic City of Bremen, Germany |
| 25th May | Virtual Meet OpenStreetMap NL | Amsterdam, North Holland, Netherlands |
| 25th May | East Midlands OSM Pub Meet-up : Derby | Derby, England, United Kingdom |
| 25th May | Monthly Hungarian OSM conference (topics to be determined) | Gárdony, Hungary |
| 25th May | Virtual OpenStreetMap Belgium meeting | City of Brussels, Belgium |
| 26th May | Düsseldorfer OSM-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 27th May | Missing Maps mapathon Slovakia online #3 | District of Žilina, Region of Žilina, Slovakia |
| 28th May | [Online] OpenStreetMap Foundation board of Directors - public meeting |
| 28th May | Virtual meeting of the Polish OSM Association | Cudniki, Łódź Voivodeship, Poland |
| 1st June | Stuttgarter Stammtisch (Online) | Stuttgart, Baden-Württemberg, Germany |
| 4th June | 156. Berlin-Brandenburg OpenStreetMap Stammtisch (Online) | Berlin, Berlin, Germany |
| 6th June | OSM-Sonntag (FOSSGIS-Konferenz 2021) | Rapperswil, Rapperswil-Jona, Sankt Gallen, Switzerland |
| 6th–9th June | FOSSGIS-Konferenz 2021 (Online) | Rapperswil, Rapperswil-Jona, Sankt Gallen, Switzerland |
| 10th June | Missing Maps Artsen Zonder Grenzen Mapathon |
| 15th June | 140. Treffen des OSM-Stammtisches Bonn |
| 15th June | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 18th June | Missing Maps German Red Cross Digitaltag Mapathon |
| 25th June | Düsseldorfer OSM-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 9th–11th July | State of the Map 2021 |
| 20th July | Lüneburger Mappertreffen | Lüneburg, Lower Saxony, Germany |
| 20th July | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 31st July–1st August | COSCUP 2021 OpenStreetMap x Wikidata 開放內容議程軌 (CfP) | Gongguan, Taipei, Taiwan |
| 11th August | OSM-Treffen Zürich | Zurich, Zurich, Switzerland |
| 17th August | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 24th August | East Midlands OSM Pub Meet-up : Derby | Derby, England, United Kingdom |
| 21st September | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 11th October | OSM-Treffen Zürich | Zurich, Zurich, Switzerland |
| 19th October | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 11th November | OSM-Treffen Zürich | Zurich, Zurich, Switzerland |
| 16th November | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 19th–21st November | State of the Map Africa 2021 | Nairobi, Nairobi, Kenya |
| 21st December | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
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