| 4 Maret | OpenHistoricalMap in North America | California, United States |
| 4 Maret | OSM US Mappy Hour: OpenHistoricalMap in North America |
| 5 Maret | 3. Open Data Day Flensburg | Flensburg, Schleswig-Holstein, Germany |
| 5 Maret | Missing Maps mapathon Žilina #21 | Žilina, Region of Žilina, Slovakia |
| 5 Maret | Réunion des contributeurs de Montrouge et du Sud de Paris | Montrouge, Ile-de-France, France |
| 6–7 Maret | FOSS4G:BG Open GIS Conference 2026 | Sofia, Sofia-City, Bulgaria |
| 6 Maret | OSMF Engineering Working Group meeting |
| 6 Maret | OpenStreetMap Community Meetup - Tirana | Tirana, Central Albania, Albania |
| 6 Maret | OpenStreetMap meetup in Gent - Pre-VLA-congres editie | Ghent, East Flanders, Belgium |
| 7 Maret | Vereniging Leraars Aardrijkskunde (VLA) conference 2026 | Sint-Niklaas, East Flanders, Belgium |
| 7 Maret | Social Mapping Sunday: Moort-ak Waadiny / Wellington Square Perth | Perth, Western Australia, Australia |
| 8 Maret | Social Mapping Sunday: Moort-ak Waadiny / Wellington Square Perth | Perth, Western Australia, Australia |
| 8 Maret | OSMmapperCPH | Copenhagen, Capital Region of Denmark, Denmark |
| 8 Maret | OSM Delhi Mapping Party No.27 (East Zone) | Delhi, India |
| 9 Maret | Friends of MSF UWO Mapathon | London, Ontario, Canada |
| 9 Maret | Březnový brněnský Missing Maps Mapathon na Geografickém ústavu | Brno, South Moravian Region, Czechia |
| 9 Maret | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 9 Maret | Découverte d'OpenStreetMap | Grenoble, Auvergne-Rhône-Alpes, France |
| 9 Maret | OpenStreetMap x Wikidata Taipei #86 | Chengnei, Taipei, Taiwan |
| 10 Maret | Hamburger Mappertreffen | Hamburg, Germany |
| 11 Maret | Logitech Missing Maps - Office Mapathon | Cork, Ireland |
| 11 Maret | The GAIN Mapathon | George Mason, Virginia, United States |
| 11 Maret | 185. OSM-Stammtisch Zürich | Zurich, Zurich, Switzerland |
| 11 Maret | Missing Maps Zürich Mapathon | Zurich, Zurich, Switzerland |
| 12 Maret | Münchner OSM-Treffen | Munich, Bavaria, Germany |
| 14 Maret | Camera's in kaart brengen | Leuven, Flemish Brabant, Belgium |
| 17 Maret | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 17 Maret | Réunion du groupe local de Lyon | Lyon, Auvergne-Rhône-Alpes, France |
| 17 Maret | 198. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 17 Maret | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 18 Maret | Réunion des contributeurs de Vienne (38) | Vienne, Auvergne-Rhône-Alpes, France |
| 18 Maret | Online Mapathon - Ärzte ohne Grenzen |
| 18 Maret | 20. Österreichischer OSM-Stammtisch (online) | Stainach-Pürgg, Styria, Austria |
| 19 Maret | Rhein-Neckar OSM Treffen // Intro iD-Editor | Heidelberg, Baden-Württemberg, Germany |
| 21 Maret | Missing Maps Day Olomouc 2026 | Olomouc, Olomouc Region, Czechia |
| 21 Maret | OSM Mumbai Mapping Party No.8 (Western Line - North) | Vasai-Virar, Maharashtra, India |
| 22 Maret | Frühlingsmapping 2026 | Fulda, Hesse, Germany |
| 23 Maret | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 24 Maret | Rencontre OpenStreetMap et Territoires | Plouzané, Brittany, France |
| 24–27 Maret | FOSSGIS-Konferenz 2026 | Göttingen, Lower Saxony, Germany |
| 24 Maret | East Midlands pub meet-up | Derby, England, United Kingdom |
| 27 Maret | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 28–29 Maret | Chemnitzer Linux-Tage 2026 | Chemnitz, Saxony, Germany |
| 28 Maret | FOSSGIS 2026 - OSM-Samstag | Göttingen, Lower Saxony, Germany |
| 28 Maret | Local Chapters & Communities Congress 2026 |
| 30 Maret | OSM-Stammtisch Hannover | Hanover, Lower Saxony, Germany |
| 5 April | OSM India - Monthly Online Mapathon | New Delhi, India |
| 7 April | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 7 April | Missing Maps London: (Online) Mapathon [eng] |
| 8 April | Essen OSM-Treffen | Essen, North Rhine-Westphalia, Germany |
| 11–12 April | OSM Hackweekend Berlin-Brandenburg 04/2026 | Berlin, Germany |
| 12 April | OSM Delhi Mapping Party No.28 (Meerut) | Meerut, Uttar Pradesh, India |
| 12 April | OSMmapperCPH | Copenhagen, Capital Region of Denmark, Denmark |
| 13 April | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 13 April | OpenStreetMap x Wikidata Taipei #87 | Chengnei, Taipei, Taiwan |
| 14 April | Münchner OSM-Treffen | Munich, Bavaria, Germany |
| 16 April | OSM-Treffen Freiburg/Brsg. | Freiburg im Breisgau, Baden-Württemberg, Germany |
| 18 April | OSM Mumbai Mapping Party No.9 (Central Line) | Mumbai, Maharashtra, India |
| 19 April | Mapping Party @ Chennai | Chennai, Tamil Nadu, India |
| 21 April | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 21 April | Réunion du groupe local de Lyon | Lyon, Auvergne-Rhône-Alpes, France |
| 21 April | East Midlands pub meet-up | Derby, England, United Kingdom |
| 21 April | 199. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 21 April | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 24 April | 18. Mapathon & Mapping Party Rapperswil 2025 | Rapperswil, Rapperswil-Jona, St. Gallen, Switzerland |
| 27 April | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 28 April | Kieler Mapper*innentreffen | Kiel, Schleswig-Holstein, Germany |
| 28 April | 78. Wiener OSM-Stammtisch | Vienna, Austria |
| 29 April | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 30 April–3 Mei | FOSSGIS-OSM-Communitytreffen im Linuxhotel | Essen, North Rhine-Westphalia, Germany |
| 1 Mei | MA1PING | Stuttgart, Baden-Württemberg, Germany |
| 3 Mei | OSM India - Monthly Online Mapathon | New Delhi, India |
| 5 Mei | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 5 Mei | Missing Maps London: (Online) Mapathon [eng] |
| 8 Mei | SOSM Association Annual Meeting | Bergdietikon, Aargau, Switzerland |
| 10 Mei | OSM Delhi Mapping Party No.29 (South Zone) | Delhi, India |
| 11 Mei | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 11 Mei | OpenStreetMap x Wikidata Taipei #88 | Chengnei, Taipei, Taiwan |
| 13 Mei | Münchner OSM-Treffen | Munich, Bavaria, Germany |
| 16 Mei | OSM Mumbai Mapping Party No.10 (Trans-Harbour Line - North) | Navi Mumbai, Maharashtra, India |
| 19 Mei | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 19 Mei | Réunion du groupe local de Lyon | Lyon, Auvergne-Rhône-Alpes, France |
| 19 Mei | 200. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 19 Mei | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 25 Mei | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 27 Mei | 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 Agustus | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 4 Agustus | Missing Maps London: (Online) Mapathon [eng] |
| 10 Agustus | OpenStreetMap x Wikidata Taipei #91 | Chengnei, Taipei, Taiwan |
| 18 Agustus | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 18 Agustus | 203. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 18 Agustus | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 26 Agustus | 79. Wiener OSM-Stammtisch | Vienna, Austria |
| 26 Agustus | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 27 Agustus | OpenStreetMap West Bengal Mapping Party + AnkushTheHero Day |
| 28–30 Agustus | State of the Map - Paris | Champs-sur-Marne, Ile-de-France, France |
| 28 Agustus | 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 | 22. Österreichischer OSM-Stammtisch (online) | Stainach-Pürgg, Styria, Austria |
| 15 September | 204. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 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 Desember | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 1 Desember | Missing Maps London: (Online) Mapathon [eng] |
| 7 Desember | OpenStreetMap x Wikidata Taipei #95 | Chengnei, Taipei, Taiwan |
| 9 Desember | 23. Österreichischer OSM-Stammtisch (online) | Stainach-Pürgg, Styria, Austria |
| 13 Desember | Essen OSM-Treffen | Essen, North Rhine-Westphalia, Germany |
| 15 Desember | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 15 Desember | 207. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 15 Desember | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 18 Desember | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
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