| 11 Abril | Cville Sidewalks Mapathon | Charlottesville, Virginia, United States |
| 13 Abril | Hamburger Mappertreffen | Hamburg, Germany |
| 14 Abril | Using maps to help prevent and respond to Gender Based Violence |
| 14 Abril | 3. Mapathon Rapperswil mit Missing Maps Zürich (virtuell) | Zurich, Zurich, Switzerland |
| 14 Abril | OpenStreetMap Michigan Meetup | Michigan, United States |
| 14 Abril | OpenStreetMap U.S. Virtual Mappy Hour | Kansas, United States |
| 15 Abril | University of Liverpool Mapathon 2021! | Liverpool, England, United Kingdom |
| 15 Abril | Virtual Civic Hack & Map Night | San Jose, California, United States |
| 16 Abril | PoliMappers: Humanitarian Mapping with Map For Future |
| 20 Abril | 138. Treffen des OSM-Stammtisches Bonn |
| 20 Abril | OSM-Verkehrswende #22 (Online) | Berlin, Berlin, Germany |
| 20 Abril | OSM East Midlands/Nottingham meetup (online) | Nottingham, England, United Kingdom |
| 20 Abril | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 21 Abril | MapABQ April virtual meetup | Albuquerque, New Mexico, United States |
| 22 Abril | Loyola University Chicago Friends of MSF Earth Day Mapathon | Chicago, Illinois, United States |
| 23 Abril | Swiss OpenStreetMap Association Annual General Meeting | Weggis, Luzern, Switzerland |
| 26 Abril | Bremer Mappertreffen (Online) | Bremen, Free Hanseatic City of Bremen, Germany |
| 28 Abril | Düsseldorfer OSM-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 30 Abril | Map The U Spring 2021 | Salt Lake City, Utah, United States |
| 30 Abril | [Online] OpenStreetMap Foundation board of Directors - public meeting |
| 4 Mayu | Missing Maps London Mapathon | Westminster, England, United Kingdom |
| 4 Mayu | Virtuelles Niederbayern-Treffen | Oberframmering, Landau an der Isar, Bavaria, Germany |
| 5 Mayu | Stuttgart: Virtueller Stammtisch am 5. Mai 2021 |
| 5 Mayu | Stuttgarter Stammtisch (Online) | Stuttgart, Baden-Württemberg, Germany |
| 11 Mayu | OSM-Treffen Zürich | Zurich, Zurich, Switzerland |
| 11 Mayu | Hamburger Mappertreffen | Hamburg, Germany |
| 12 Mayu | Stammtisch Köln | Cologne, North Rhine-Westphalia, Germany |
| 13 Mayu | 155. Berlin-Brandenburg OpenStreetMap Stammtisch (Online) | Berlin, Berlin, Germany |
| 18 Mayu | 139. Treffen des OSM-Stammtisches Bonn |
| 18 Mayu | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 20–22 Mayu | Mapping USA |
| 25 Mayu | Virtual OpenStreetMap Belgium meeting | City of Brussels, Belgium |
| 26 Mayu | Düsseldorfer OSM-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 4 Xunu | 156. Berlin-Brandenburg OpenStreetMap Stammtisch (Online) | Berlin, Berlin, Germany |
| 6–9 Xunu | FOSSGIS-Konferenz 2021 (Online) | Rapperswil, Rapperswil-Jona, Sankt Gallen, Switzerland |
| 6 Xunu | OSM-Sonntag (FOSSGIS-Konferenz 2021) | Rapperswil, Rapperswil-Jona, Sankt Gallen, Switzerland |
| 10 Xunu | Missing Maps Artsen Zonder Grenzen Mapathon |
| 15 Xunu | 140. Treffen des OSM-Stammtisches Bonn |
| 15 Xunu | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 18 Xunu | Missing Maps German Red Cross Digitaltag Mapathon |
| 25 Xunu | Düsseldorfer OSM-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 9–11 Xunetu | State of the Map 2021 |
| 20 Xunetu | Lüneburger Mappertreffen | Lüneburg, Lower Saxony, Germany |
| 11 Agostu | OSM-Treffen Zürich | Zurich, Zurich, Switzerland |
| 11 Ochobre | OSM-Treffen Zürich | Zurich, Zurich, Switzerland |
| 11 Payares | OSM-Treffen Zürich | Zurich, Zurich, Switzerland |
| 19–21 Payares | State of the Map Africa 2021 | Nairobi, Nairobi, Kenya |
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