| 20 四月 | Understanding the OpenStreetMap ecosystem | Liège, Liège, Belgium |
| 21 四月 | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 21 四月 | Mappy Hour OSM España | Sobrarbe, Aragon, Spain |
| 21 四月 | Réunion du groupe local de Lyon | Lyon, Auvergne-Rhône-Alpes, France |
| 21 四月 | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, Germany |
| 21 四月 | East Midlands pub meet-up | Derby, England, United Kingdom |
| 21 四月 | London pub meet-up | City of London, England, United Kingdom |
| 21 四月 | 199. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 21 四月 | Edinburgh Social Meetup | City of Edinburgh, Scotland, United Kingdom |
| 21 四月 | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 23 四月 | Capital One TPM Summit Global Mapathon | Richmond, Virginia, United States |
| 23 四月 | Missing Maps mapathon Bratislava #13 | Bratislava, Region of Bratislava, Slovakia |
| 23 四月 | Presentacion de initiative piloto: Capitulos de ONU Mapas |
| 23 四月 | MapRVA Virtual Map & Yap with LaToya Gray-Sparks, VA DHR | Richmond, Virginia, United States |
| 23 四月 | Modifichiamo Wiki e OSM insieme! | Catania, Sicily, Italy |
| 24 四月 | UN Mappers Mappy Hour |
| 24 四月 | 18. Mapathon & Mapping Party Rapperswil 2026 | Rapperswil, Rapperswil-Jona, St. Gallen, Switzerland |
| 25 四月 | Hamburger Mapping-Spaziergang (in Pinneberg) | Pinneberg, Schleswig-Holstein, Germany |
| 25 四月 | State of the Map Croatia (DORS/CLUC 2026) | City of Zagreb, Croatia |
| 25 四月 | OSM Mumbai Mapping Party No.9 (Central Line) | Mumbai, Maharashtra, India |
| 27 四月 | B of A - EC AM's Mapathon -Global Service Month | Farmington, Connecticut, United States |
| 27 四月 | Dubnový Missing Maps mapathon na Ústavu botaniky a zoologie | Brno, South Moravian Region, Czechia |
| 27 四月 | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 27 四月 | Rencontre Saint-Étienne et sud Loire | Saint-Étienne, Auvergne-Rhône-Alpes, France |
| 27 四月 | Bremer Mappertreffen | Bremen, Bremen, Germany |
| 28 四月 | 78. Wiener OSM-Stammtisch | Vienna, Austria |
| 28 四月 | Kieler Mapper*innentreffen | Kiel, Schleswig-Holstein, Germany |
| 28 四月 | OSM-Verkehrswende #74 | Berlin, Germany |
| 29 四月 | OSM-Stammtisch Hannover | Hanover, Lower Saxony, Germany |
| 29 四月 | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 30 四月–3 五月 | FOSSGIS-OSM-Communitytreffen im Linuxhotel | Essen, North Rhine-Westphalia, Germany |
| 1 五月 | MA1PPING | Weil der Stadt (Kernstadt), Baden-Württemberg, Germany |
| 2 五月 | Workshop: JOSM - Java OpenStreetMap Editor - Eine Einführung | Augsburg, Bavaria, Germany |
| 2 五月 | Mappando si Vinci! - 2 Maggio 2026 | Spicchio-Sovigliana, Vinci, Tuscany, Italy |
| 2 五月 | Braunschweiger Mappertreffen im Stratum 0 Hackerspace | Brunswick, Lower Saxony, Germany |
| 2 五月 | OSM India - Monthly Online Mapathon | New Delhi, India |
| 5 五月 | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 5 五月 | Missing Maps London: (Online) Mapathon [eng] |
| 6 五月 | Stuttgarter OpenStreetMap-Treffen | Stuttgart, Baden-Württemberg, Germany |
| 7 五月 | Surveillance mapping with MapRVA | Richmond, Virginia, United States |
| 8 五月 | SOSM Association Annual Meeting | Bergdietikon, Aargau, Switzerland |
| 10 五月 | OSMmapperCPH | Copenhagen, Capital Region of Denmark, Denmark |
| 10 五月 | OSM Delhi Mapping Party No.29 (South Zone) | Delhi, India |
| 11 五月 | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 11 五月 | OpenStreetMap x Wikidata Taipei #88 | Chengnei, Taipei, Taiwan |
| 12 五月 | Hamburger Mappertreffen | Hamburg, Germany |
| 13 五月 | 2026 Spring End Maptime | Amsterdam, North Holland, Netherlands |
| 13 五月 | Münchner OSM-Treffen | Munich, Bavaria, Germany |
| 16 五月 | OSM Mumbai Mapping Party No.10 (Trans-Harbour Line - North) | Navi Mumbai, Maharashtra, India |
| 19 五月 | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 19 五月 | Réunion du groupe local de Lyon | Lyon, Auvergne-Rhône-Alpes, France |
| 19 五月 | 200. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 19 五月 | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, Germany |
| 19 五月 | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 20 五月 | Stammtisch Karlsruhe | Karlsruhe, Baden-Württemberg, Germany |
| 23 五月 | Raccolta dati aree verdi @ Giornata Mondiale della Biodiversità 2026 - Citizen Science Ferrara | Ferrara, Emilia-Romagna, Italy |
| 25 五月 | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 27 五月 | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 2 六月 | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 2 六月 | Missing Maps London: (Online) Mapathon [eng] |
| 4 六月 | State of the Map Baltics 2026 | Riga, Latvia |
| 6 六月 | Braunschweiger Mappertreffen im Stratum 0 Hackerspace | Brunswick, Lower Saxony, Germany |
| 7 六月 | OSM India - Monthly Online Mapathon | New Delhi, India |
| 8 六月 | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 8 六月 | OpenStreetMap x Wikidata Taipei #89 | Chengnei, Taipei, Taiwan |
| 9 六月 | Hamburger Mappertreffen | Hamburg, Germany |
| 11–13 六月 | State of the Map US 2026 | Madison, Wisconsin, United States |
| 11 六月 | Münchner OSM-Treffen | Munich, Bavaria, Germany |
| 14 六月 | OSM Delhi Mapping Party No.30 (West Zone) | Delhi, India |
| 16 六月 | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 16 六月 | Réunion du groupe local de Lyon | Lyon, Auvergne-Rhône-Alpes, France |
| 16 六月 | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, Germany |
| 16 六月 | 201. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 16 六月 | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 17 六月 | 21. Österreichischer OSM-Stammtisch (online) | Stainach-Pürgg, Styria, Austria |
| 18 六月 | Essen OSM-Treffen | Essen, North Rhine-Westphalia, Germany |
| 19 六月 | Missing Maps Mapathon in Stuttgart | Stuttgart, Baden-Württemberg, Germany |
| 20 六月 | OSM Mumbai Mapping Party No.11 (Trans-Harbour Line - South) | Maharashtra, India |
| 22 六月 | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 26–28 六月 | State of the Map Africa 2025 | Dar es-Salaam, Tanzania |
| 26 六月 | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 7 七月 | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 7 七月 | Missing Maps London: (Online) Mapathon [eng] |
| 13 七月 | OpenStreetMap x Wikidata Taipei #90 | Chengnei, Taipei, Taiwan |
| 14 七月 | Hamburger Mappertreffen | Hamburg, Germany |
| 15 七月 | Online Mapathon von ÄRZTE OHNE GRENZEN |
| 21 七月 | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 21 七月 | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, Germany |
| 21 七月 | 202. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 21 七月 | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 29 七月 | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 4 八月 | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 4 八月 | Missing Maps London: (Online) Mapathon [eng] |
| 10 八月 | OpenStreetMap x Wikidata Taipei #91 | Chengnei, Taipei, Taiwan |
| 16 八月 | Kartenwerkstatt Oschatz | Oschatz, Saxony, Germany |
| 18 八月 | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 18 八月 | 203. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 18 八月 | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, Germany |
| 18 八月 | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 26 八月 | 79. Wiener OSM-Stammtisch | Vienna, Austria |
| 26 八月 | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 27 八月 | OpenStreetMap West Bengal Mapping Party + AnkushTheHero Day |
| 28–30 八月 | State of the Map 2026 | Champs-sur-Marne, Ile-de-France, France |
| 28 八月 | Essen OSM-Treffen | Essen, North Rhine-Westphalia, Germany |
| 1 九月 | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 1 九月 | Missing Maps London: (Online) Mapathon [eng] |
| 7 九月 | OpenStreetMap x Wikidata Taipei #92 | Chengnei, Taipei, Taiwan |
| 15 九月 | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 15 九月 | 22. Österreichischer OSM-Stammtisch (online) | Stainach-Pürgg, Styria, Austria |
| 15 九月 | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, Germany |
| 15 九月 | 204. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 15 九月 | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 25 九月 | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 26–27 九月 | Karlsruhe Hack Weekend September 2026 | Karlsruhe, Baden-Württemberg, Germany |
| 3 十月 | Essen OSM-Treffen | Essen, North Rhine-Westphalia, Germany |
| 5 十月 | OpenStreetMap x Wikidata Taipei #93 | Chengnei, Taipei, Taiwan |
| 6 十月 | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 6 十月 | Missing Maps London: (Online) Mapathon [eng] |
| 20 十月 | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 20 十月 | 205. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 20 十月 | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, Germany |
| 20 十月 | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 27–29 十月 | State of the Map LATAM 2026 | Mexico City, Mexico City, Mexico |
| 27 十月 | 80. Wiener OSM-Stammtisch | Vienna, Austria |
| 28 十月 | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 3 十一月 | Missing Maps London: (Online) Mapathon [eng] |
| 7 十一月 | Maker Days Salzburg | Salzburg, Salzburg, Austria |
| 9 十一月 | OpenStreetMap x Wikidata Taipei #94 | Chengnei, Taipei, Taiwan |
| 17 十一月 | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 17 十一月 | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, Germany |
| 17 十一月 | 206. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 17 十一月 | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 25 十一月 | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 1 十二月 | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 1 十二月 | Missing Maps London: (Online) Mapathon [eng] |
| 7 十二月 | OpenStreetMap x Wikidata Taipei #95 | Chengnei, Taipei, Taiwan |
| 9 十二月 | 23. Österreichischer OSM-Stammtisch (online) | Stainach-Pürgg, Styria, Austria |
| 13 十二月 | Essen OSM-Treffen | Essen, North Rhine-Westphalia, Germany |
| 15 十二月 | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 15 十二月 | 207. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 15 十二月 | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, Germany |
| 15 十二月 | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 18 十二月 | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
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