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