| 25 Februar | UCSC AMSA First Mapathon | Santa Cruz, California, United States |
| 25 Februar | Missing Maps Mapathon na ČVUT v Praze | Prague, Czechia |
| 25 Februar | OSM-Stammtisch Hannover | Hanover, Lower Saxony, Germany |
| 25 Februar | MSF Luxembourg hybrid Mapathon | Luxembourg, Luxembourg |
| 25 Februar | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 26–27 Februar | OpenThePaths 2026: Connecting People and Places Through Sustainable Access | Seattle, Washington, United States |
| 26 Februar | Vortrag: Mitmachen bei OpenStreetMap, der Basis vieler Outdoor-Apps | Essen, North Rhine-Westphalia, Germany |
| 26 Februar | PoliMappers Maptedì | Milan, Lombardy, Italy |
| 26 Februar | Mapillary: Celebrating 3 Billion Images | Zurich, Zurich, Switzerland |
| 26 Februar | Mapathon - Kartieren für Freiwillige | Vienna, Austria |
| 26 Februar | Asamblea General Ordinaria - Asociación OpenStreetMap España | Helechosa de los Montes, Extremadura, Spain |
| 26 Februar | Friends of MSF Mapathon | Santa Clara, California, United States |
| 27 Februar | UN Maps Validation Friday Chat & Map |
| 27 Februar | Missing water Bodies of Delhi | Shafipur, Noida, Uttar Pradesh, India |
| 27 Februar | Vortrag: Mitmachen bei OpenStreetMap, der Basis vieler Outdoor-Apps | Essen, North Rhine-Westphalia, Germany |
| 27 Februar | Potsdamer Mappertreffen | Potsdam, Brandenburg, Germany |
| 28 Februar | Ferrara mapping party | Ferrara, Emilia-Romagna, Italy |
| 28 Februar | Mapping Day @ Messina | Messina, Sicily, Italy |
| 28 Februar | OpenStreetMap Community Meet-Up & Mapathon | Kadıköy, Turkey |
| 1 März | OSM India - Monthly Online Mapathon | New Delhi, India |
| 1 März | OSM Mapping Party @ Madurai | Madurai, Tamil Nadu, India |
| 3 März | PoliMappers Maptedì | Milan, Lombardy, Italy |
| 3 März | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 3 März | Rencontre OpenStreetMap à Lille | Lille, Hauts-de-France, France |
| 3 März | Missing Maps London: (Online) Mapathon [eng] |
| 4 März | iD Community Chat |
| 4 März | OSM Indoor Meetup |
| 4 März | Kvartální OSM pivo | Brno, South Moravian Region, Czechia |
| 4 März | Stuttgarter OpenStreetMap-Treffen | Stuttgart, Baden-Württemberg, Germany |
| 4 März | Harzer OSM-Stammtisch |
| 4 März | OSM US Mappy Hour: OpenHistoricalMap in North America |
| 4 März | OpenHistoricalMap in North America | California, United States |
| 5 März | 3. Open Data Day Flensburg | Flensburg, Schleswig-Holstein, Germany |
| 6–7 März | FOSS4G:BG Open GIS Conference 2026 | Sofia, Sofia-City, Bulgaria |
| 6 März | OSMF Engineering Working Group meeting |
| 6 März | OpenStreetMap meetup in Gent - Pre-VLA-congres editie | Ghent, East Flanders, Belgium |
| 7 März | Vereniging Leraars Aardrijkskunde (VLA) conference 2026 | Sint-Niklaas, East Flanders, Belgium |
| 7 März | Social Mapping Sunday: Moort-ak Waadiny / Wellington Square Perth | Perth, Western Australia, Australia |
| 8 März | Social Mapping Sunday: Moort-ak Waadiny / Wellington Square Perth | Perth, Western Australia, Australia |
| 8 März | OSM Delhi Mapping Party No.27 (East Zone) | Delhi, India |
| 8 März | OSMmapperCPH | Copenhagen, Capital Region of Denmark, Denmark |
| 9 März | Friends of MSF UWO Mapathon | London, Ontario, Canada |
| 9 März | Březnový brněnský Missing Maps Mapathon na Geografickém ústavu | Brno, South Moravian Region, Czechia |
| 9 März | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 9 März | OpenStreetMap x Wikidata Taipei #86 | Chengnei, Taipei, Taiwan |
| 10 März | Hamburger Mappertreffen | Hamburg, Germany |
| 11 März | Logitech Missing Maps - Office Mapathon | Cork, Ireland |
| 11 März | The GAIN Mapathon | George Mason, Virginia, United States |
| 11 März | 185. OSM-Stammtisch Zürich | Zurich, Zurich, Switzerland |
| 12 März | Münchner OSM-Treffen | Munich, Bavaria, Germany |
| 14 März | Camera's in kaart brengen | Leuven, Flemish Brabant, Belgium |
| 17 März | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 17 März | Réunion du groupe local de Lyon | Lyon, Auvergne-Rhône-Alpes, France |
| 17 März | 198. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 17 März | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 18 März | Online Mapathon - Ärzte ohne Grenzen |
| 18 März | 20. Österreichischer OSM-Stammtisch (online) | Stainach-Pürgg, Styria, Austria |
| 19 März | Rhein-Neckar OSM Treffen // Intro iD-Editor | Heidelberg, Baden-Württemberg, Germany |
| 21 März | Missing Maps Day Olomouc 2026 | Olomouc, Olomouc Region, Czechia |
| 21 März | OSM Mumbai Mapping Party No.8 (Western Line - North) | Vasai-Virar, Maharashtra, India |
| 22 März | Frühlingsmapping 2026 | Fulda, Hesse, Germany |
| 23 März | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 24 März | Rencontre OpenStreetMap et Territoires | Plouzané, Brittany, France |
| 24–27 März | FOSSGIS-Konferenz 2026 | Göttingen, Lower Saxony, Germany |
| 24 März | East Midlands pub meet-up | Derby, England, United Kingdom |
| 27 März | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 28–29 März | Chemnitzer Linux-Tage 2026 | Chemnitz, Saxony, Germany |
| 28 März | FOSSGIS 2026 - OSM-Samstag | Göttingen, Lower Saxony, Germany |
| 28 März | Local Chapters & Communities Congress 2026 |
| 5 Abrell | OSM India - Monthly Online Mapathon | New Delhi, India |
| 7 Abrell | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 7 Abrell | Missing Maps London: (Online) Mapathon [eng] |
| 8 Abrell | Essen OSM-Treffen | Essen, North Rhine-Westphalia, Germany |
| 11–12 Abrell | OSM Hackweekend Berlin-Brandenburg 04/2026 | Berlin, Germany |
| 12 Abrell | OSM Delhi Mapping Party No.28 (Meerut) | Meerut, Uttar Pradesh, India |
| 13 Abrell | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 13 Abrell | OpenStreetMap x Wikidata Taipei #87 | Chengnei, Taipei, Taiwan |
| 14 Abrell | Münchner OSM-Treffen | Munich, Bavaria, Germany |
| 16 Abrell | OSM-Treffen Freiburg/Brsg. | Freiburg im Breisgau, Baden-Württemberg, Germany |
| 18 Abrell | OSM Mumbai Mapping Party No.9 (Central Line) | Mumbai, Maharashtra, India |
| 19 Abrell | Mapping Party @ Chennai | Chennai, Tamil Nadu, India |
| 21 Abrell | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 21 Abrell | Réunion du groupe local de Lyon | Lyon, Auvergne-Rhône-Alpes, France |
| 21 Abrell | 199. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 21 Abrell | East Midlands pub meet-up | Derby, England, United Kingdom |
| 21 Abrell | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 24 Abrell | 18. Mapathon & Mapping Party Rapperswil 2025 | Rapperswil, Rapperswil-Jona, St. Gallen, Switzerland |
| 27 Abrell | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 28 Abrell | 78. Wiener OSM-Stammtisch | Vienna, Austria |
| 28 Abrell | Kieler Mapper*innentreffen | Kiel, Schleswig-Holstein, Germany |
| 29 Abrell | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 30 Abrell–3 May | FOSSGIS-OSM-Communitytreffen im Linuxhotel | Essen, North Rhine-Westphalia, Germany |
| 1 May | MA1PING | Stuttgart, Baden-Württemberg, Germany |
| 3 May | OSM India - Monthly Online Mapathon | New Delhi, India |
| 5 May | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 5 May | Missing Maps London: (Online) Mapathon [eng] |
| 10 May | OSM Delhi Mapping Party No.29 (South Zone) | Delhi, India |
| 11 May | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 11 May | OpenStreetMap x Wikidata Taipei #88 | Chengnei, Taipei, Taiwan |
| 13 May | Münchner OSM-Treffen | Munich, Bavaria, Germany |
| 16 May | OSM Mumbai Mapping Party No.10 (Trans-Harbour Line - North) | Navi Mumbai, Maharashtra, India |
| 19 May | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 19 May | Réunion du groupe local de Lyon | Lyon, Auvergne-Rhône-Alpes, France |
| 19 May | 200. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 19 May | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 25 May | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 27 May | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 2 Juni | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 2 Juni | Missing Maps London: (Online) Mapathon [eng] |
| 7 Juni | OSM India - Monthly Online Mapathon | New Delhi, India |
| 8 Juni | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 8 Juni | OpenStreetMap x Wikidata Taipei #89 | Chengnei, Taipei, Taiwan |
| 11 Juni | Münchner OSM-Treffen | Munich, Bavaria, Germany |
| 14 Juni | OSM Delhi Mapping Party No.30 (West Zone) | Delhi, India |
| 16 Juni | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 16 Juni | Réunion du groupe local de Lyon | Lyon, Auvergne-Rhône-Alpes, France |
| 16 Juni | 201. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 16 Juni | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 17 Juni | 21. Österreichischer OSM-Stammtisch (online) | Stainach-Pürgg, Styria, Austria |
| 18 Juni | Essen OSM-Treffen | Essen, North Rhine-Westphalia, Germany |
| 20 Juni | OSM Mumbai Mapping Party No.11 (Trans-Harbour Line - South) | Maharashtra, India |
| 22 Juni | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 26–28 Juni | State of the Map Africa 2025 | Dar es-Salaam, Tanzania |
| 26 Juni | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 7 Juli | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 7 Juli | Missing Maps London: (Online) Mapathon [eng] |
| 13 Juli | OpenStreetMap x Wikidata Taipei #90 | Chengnei, Taipei, Taiwan |
| 21 Juli | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 21 Juli | 202. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 21 Juli | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 29 Juli | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 4 August | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 4 August | Missing Maps London: (Online) Mapathon [eng] |
| 10 August | OpenStreetMap x Wikidata Taipei #91 | Chengnei, Taipei, Taiwan |
| 18 August | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 18 August | 203. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 18 August | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 26 August | 79. Wiener OSM-Stammtisch | Vienna, Austria |
| 26 August | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 27 August | OpenStreetMap West Bengal Mapping Party + AnkushTheHero Day |
| 28–30 August | State of the Map - Paris | Champs-sur-Marne, Ile-de-France, France |
| 28 August | Essen OSM-Treffen | Essen, North Rhine-Westphalia, Germany |
| 1 September | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 1 September | Missing Maps London: (Online) Mapathon [eng] |
| 7 September | OpenStreetMap x Wikidata Taipei #92 | Chengnei, Taipei, Taiwan |
| 15 September | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 15 September | 204. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 15 September | 22. Österreichischer OSM-Stammtisch (online) | Stainach-Pürgg, Styria, Austria |
| 15 September | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 25 September | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 3 Oktober | Essen OSM-Treffen | Essen, North Rhine-Westphalia, Germany |
| 5 Oktober | OpenStreetMap x Wikidata Taipei #93 | Chengnei, Taipei, Taiwan |
| 6 Oktober | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 6 Oktober | Missing Maps London: (Online) Mapathon [eng] |
| 20 Oktober | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 20 Oktober | 205. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 20 Oktober | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 27 Oktober | 80. Wiener OSM-Stammtisch | Vienna, Austria |
| 28 Oktober | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 3 November | Missing Maps London: (Online) Mapathon [eng] |
| 7 November | Maker Days Salzburg | Salzburg, Salzburg, Austria |
| 9 November | OpenStreetMap x Wikidata Taipei #94 | Chengnei, Taipei, Taiwan |
| 17 November | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 17 November | 206. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 17 November | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 25 November | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 1 December | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 1 December | Missing Maps London: (Online) Mapathon [eng] |
| 7 December | OpenStreetMap x Wikidata Taipei #95 | Chengnei, Taipei, Taiwan |
| 9 December | 23. Österreichischer OSM-Stammtisch (online) | Stainach-Pürgg, Styria, Austria |
| 13 December | Essen OSM-Treffen | Essen, North Rhine-Westphalia, Germany |
| 15 December | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 15 December | 207. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 15 December | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 18 December | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
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