| 20 Februar–8 Mars | Remote mapping party in Penza | Домашняя картовечеринка в Пензе | Penza, Penza Oblast, Russia |
| 27–28 Februar | Univers3s: Séminaire de Formation en OpenStreetMap |
| 27–28 Februar | Incontro mensile OSMers BI-VC-CVL (online) | Biella, Piemont, Italy |
| 27 Februar | Friends of MSF Ottawa Mapathon on/sur OpenStreetMap |
| 28 Februar | FOSSGIS-OSM-Communitytreffen (Online) | Essen, North Rhine-Westphalia, Germany |
| 1 Mars | Missing Maps CartONG Mapathon |
| 2 Mars | Missing Maps London Mapathon | Westminster, England, United Kingdom |
| 2 Mars | Virtuelles Niederbayern-Treffen | Oberframmering, Landau an der Isar, Bavaria, Germany |
| 2 Mars | London virtual OSM chat & drinks |
| 3 Mars | UN Mappers weekly mapathon |
| 3 Mars | Missing Maps German Red Cross: Validierungsmapathon für erfahrene Kartierer |
| 4 Mars | TechGirlz Workshop: Mapping For Humanity, Using Digital Mapping To Better The World |
| 4 Mars | Virtual Civic Hack & Map Night | San Jose, California, United States |
| 4 Mars | Dresdner OSM-Stammtisch | Dresden, Saxony, Germany |
| 4 Mars | OSGeo.nl: De Grote Geo Show OpenStreetMap Special |
| 4 Mars | Mapper*innentreffen Bochum | North Rhine-Westphalia, Germany |
| 5 Mars | Collaborative and Humanitarian Mapping #1: OpenStreetMap introduction (Open Data Day) |
| 5 Mars | Open Belgium 2021 : OSM news and discussions | City of Brussels, Belgium |
| 5 Mars | Missing Maps UC Davis Doctors Without Borders Mapathon |
| 5 Mars | Virtual community meeting. | Cudniki, Łódź Voivodeship, Poland |
| 6 Mars | Open Data Day 2021 |
| 6 Mars | Tanzania Data Lab + OpenMap Development Tanzania: HIV/AIDS hotspots and testing facilities Mapathon | Dar es Salaam, Tanzania |
| 6–7 Mars | OpenStreetMap Uganda Mapping Uganda's New Cities Mapthon | Kampala, Central Region, Uganda |
| 6 Mars | Open Data Day Taiwan 2021 | Huashan, Taipei, Taiwan |
| 6 Mars | MAPAbabae 2021: #ChooseToChallenge Gender Inequality in Open Mapping | Quezon City, Philippines |
| 6 Mars | Open Gender Data for Tanzania - What is missing? Why does it matter? |
| 8 Mars | Missing Maps American Red Cross International Women's Day Mapathon 2021 |
| 8 Mars | Missing Maps CartONG Mapathon |
| 8 Mars | OSM x Wikidata #26 | Huashan, Taipei, Taiwan |
| 8 Mars | OpenStreetMap U.S. Virtual Mappy Hour | Kansas, United States |
| 9 Mars | Hamburger Mappertreffen | Hamburg, Germany |
| 10 Mars | Briefing on OSMF 2021 Community Survey |
| 10 Mars | Torino Virtual Mapping Party 2021 |
| 10 Mars | Missing Maps German Red Cross Einführung JOSM Mapathon |
| 10 Mars | OpenStreetMap Michigan Meetup | Michigan, United States |
| 10 Mars | Briefing on the 2021 OSMF Community Survey |
| 11 Mars | Briefing on the 2021 OSMF Community Survey |
| 11 Mars | NIGERIA SE4ALL Remote Mapathon |
| 11 Mars | UN Mappers weekly mapathon |
| 11 Mars | OSM-Treffen Zürich | Zurich, Zurich, Switzerland |
| 11 Mars | 153. Berlin-Brandenburg OpenStreetMap Stammtisch (Online) | Berlin, Berlin, Germany |
| 11 Mars | Münchner OSM-Stammtisch | Munich, Bavaria, Germany |
| 12–13 Mars | Remote DB Regio Hackathon | Berlin, Berlin, Germany |
| 12 Mars | Collaborative and Humanitarian Mapping #2: Mapping deforestation in the Amazon rainforest with JOSM |
| 13 Mars | Missing Maps Friends of MSF Lancaster Mapathon |
| 15 Mars | Missing Maps CartONG Mapathon |
| 16 Mars | 137. Treffen des OSM-Stammtisches Bonn |
| 16 Mars | OSM-Verkehrswende #21 (Online) | Berlin, Berlin, Germany |
| 16 Mars | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 18 Mars | Virtual Civic Hack & Map Night | San Jose, California, United States |
| 19 Mars | UN Mappers weekly mapathon |
| 22 Mars | Missing Maps CartONG Mapathon |
| 22 Mars | Bremer Mappertreffen (Online) | Bremen, Free Hanseatic City of Bremen, Germany |
| 24 Mars | Geomob ft. Michael Montani (Unite Maps, UN Mappers) |
| 24 Mars | OpenStreetMap U.S. Virtual Mappy Hour (duplicate) | Kansas, United States |
| 24 Mars | OpenStreetMap U.S. Virtual Mappy Hour | Kansas, United States |
| 25 Mars | GISRUK Webinar: Semantic geographic knowledge on a world-scale, interlinking OpenStreetMap and knowledge graphs |
| 25 Mars | UN Mappers weekly mapathon |
| 26 Mars | Mapio Cymru: Found in a map of Wales Workshop |
| 26 Mars | [Online] OpenStreetMap Foundation board of Directors - public meeting |
| 26 Mars | Webinar GEAM - GFOSS.it: OpenDroneMap, un ecosistema libero per foto aeree |
| 26 Mars | Collaborative and Humanitarian Mapping #3: Mapping informal settlements with Mapillary and JOSM |
| 26 Mars | Düsseldorfer OSM-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 29 Mars | Missing Maps CartONG Mapathon |
| 30 Mars | Virtual OpenStreetMap Belgium meeting | City of Brussels, Belgium |
| 31 Mars | UN Mappers weekly mapathon |
| 7 April | Numérique Éducatif Libre Webinaire : Quels usages pédagogiques avec OpenStreetMap ? |
| 8 April | Missing Maps Artsen Zonder Grenzen Mapathon |
| 8 April | Missing Maps Studentendesk Rode Kruis Maastricht |
| 9 April | 154. Berlin-Brandenburg OpenStreetMap Stammtisch (Online) | Berlin, Berlin, Germany |
| 13 April | Hamburger Mappertreffen | Hamburg, Germany |
| 20 April | 138. Treffen des OSM-Stammtisches Bonn |
| 20 April | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 23 April | Swiss OpenStreetMap Association Annual General Meeting | Weggis, Luzern, Switzerland |
| 28 April | Düsseldorfer OSM-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 11 Mai | OSM-Treffen Zürich | Zurich, Zurich, Switzerland |
| 11 Mai | Hamburger Mappertreffen | Hamburg, Germany |
| 12 Mai | Stammtisch Köln | Cologne, North Rhine-Westphalia, Germany |
| 13 Mai | 155. Berlin-Brandenburg OpenStreetMap Stammtisch (Online) | Berlin, Berlin, Germany |
| 18 Mai | 139. Treffen des OSM-Stammtisches Bonn |
| 18 Mai | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 26 Mai | Düsseldorfer OSM-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 6 Juni | OSM-Sonntag (FOSSGIS-Konferenz 2021) | Rapperswil, Rapperswil-Jona, Sankt Gallen, Switzerland |
| 6–9 Juni | 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 |
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