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