| 21 Ebrel | MapABQ April virtual meetup | Albuquerque, New Mexico, United States |
| 22 Ebrel | Loyola University Chicago Friends of MSF Earth Day Mapathon | Chicago, Illinois, United States |
| 23 Ebrel | Swiss OpenStreetMap Association Annual General Meeting | Weggis, Luzern, Switzerland |
| 23 Ebrel | Virtual meeting of the Polish OSM Association | Cudniki, Łódź Voivodeship, Poland |
| 24 Ebrel | 開發者地圖大亂鬥 | Chengnei, Taipei, Taiwan |
| 24 Ebrel | Incontro mensile OSMers BI-VC-CVL (online) | Biella, Piemont, Italy |
| 26 Ebrel | Birthday of the gimmisn house numbering tool, height measurement, displaying vector tiles |
| 26 Ebrel | Birthday of the gimmisn house numbering tool, height measurement, displaying vector tiles | Budapest, Hungary |
| 26 Ebrel | Bremer Mappertreffen (Online) | Bremen, Free Hanseatic City of Bremen, Germany |
| 27 Ebrel | Mapatón Madrid streets | Madrid, Community of Madrid, Spain |
| 27 Ebrel | OSM Stammtisch Kreis Viersen | Viersen, North Rhine-Westphalia, Germany |
| 28 Ebrel | Mapatón online de Médicos Sin Fronteras |
| 28 Ebrel | Düsseldorfer OSM-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 30 Ebrel | [Virtual Event] GeOsm : Let’s put ourselves on the map! | Ebolbam, Centre, Cameroon |
| 30 Ebrel | [Online] OpenStreetMap Foundation board of Directors - public meeting |
| 30 Ebrel | Map The U Spring 2021 | Salt Lake City, Utah, United States |
| 30 Ebrel | Virtual meeting of the Polish OSM Association | Cudniki, Łódź Voivodeship, Poland |
| 4 Mae | Missing Maps London Mapathon | Westminster, England, United Kingdom |
| 4 Mae | Virtuelles Niederbayern-Treffen | Oberframmering, Landau an der Isar, Bavaria, Germany |
| 5 Mae | Stuttgarter Stammtisch (Online) | Stuttgart, Baden-Württemberg, Germany |
| 5 Mae | Stuttgart: Virtueller Stammtisch am 5. Mai 2021 |
| 6 Mae | Dresdner OSM-Stammtisch | Dresden, Saxony, Germany |
| 6 Mae | Missing Maps DRK Online Mapathon - Einführung JOSM |
| 7 Mae | Virtual meeting of the Polish OSM Association | Cudniki, Łódź Voivodeship, Poland |
| 10 Mae | OSM x Wikidata Taipei #28 | Huashan, Taipei, Taiwan |
| 11 Mae | OSM-Treffen Zürich | Zurich, Zurich, Switzerland |
| 11 Mae | Hamburger Mappertreffen | Hamburg, Germany |
| 12 Mae | Stammtisch Köln | Cologne, North Rhine-Westphalia, Germany |
| 12 Mae | OpenStreetMap Michigan Meetup | Michigan, United States |
| 13 Mae | 155. Berlin-Brandenburg OpenStreetMap Stammtisch (Online) | Berlin, Berlin, Germany |
| 14 Mae | Virtual meeting of the Polish OSM Association | Cudniki, Łódź Voivodeship, Poland |
| 18 Mae | 139. Treffen des OSM-Stammtisches Bonn |
| 18 Mae | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 20–22 Mae | Mapping USA |
| 20 Mae | Missing Maps DRK Online Mapathon |
| 21 Mae | Virtual meeting of the Polish OSM Association | Cudniki, Łódź Voivodeship, Poland |
| 25 Mae | East Midlands OSM Pub Meet-up : Derby | Derby, England, United Kingdom |
| 25 Mae | Virtual OpenStreetMap Belgium meeting | City of Brussels, Belgium |
| 26 Mae | Düsseldorfer OSM-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 28 Mae | Virtual meeting of the Polish OSM Association | Cudniki, Łódź Voivodeship, Poland |
| 4 Mezheven | 156. Berlin-Brandenburg OpenStreetMap Stammtisch (Online) | Berlin, Berlin, Germany |
| 6–9 Mezheven | FOSSGIS-Konferenz 2021 (Online) | Rapperswil, Rapperswil-Jona, Sankt Gallen, Switzerland |
| 6 Mezheven | OSM-Sonntag (FOSSGIS-Konferenz 2021) | Rapperswil, Rapperswil-Jona, Sankt Gallen, Switzerland |
| 10 Mezheven | Missing Maps Artsen Zonder Grenzen Mapathon |
| 15 Mezheven | 140. Treffen des OSM-Stammtisches Bonn |
| 15 Mezheven | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 18 Mezheven | Missing Maps German Red Cross Digitaltag Mapathon |
| 25 Mezheven | Düsseldorfer OSM-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 9–11 Gouere | State of the Map 2021 |
| 20 Gouere | Lüneburger Mappertreffen | Lüneburg, Lower Saxony, Germany |
| 11 Eost | OSM-Treffen Zürich | Zurich, Zurich, Switzerland |
| 24 Eost | East Midlands OSM Pub Meet-up : Derby | Derby, England, United Kingdom |
| 11 Here | OSM-Treffen Zürich | Zurich, Zurich, Switzerland |
| 11 Du | OSM-Treffen Zürich | Zurich, Zurich, Switzerland |
| 19–21 Du | State of the Map Africa 2021 | Nairobi, Nairobi, Kenya |
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