| 4 April | OSM India - Monthly Online Mapathon | New Delhi, India |
| 4 April | A Synesthete's Atlas: Cartographic Improvisations between Eric Theise, Jeffrey Gordon Evans, Hannah Joyce, and Steev Hise | Tucson, Arizona, United States |
| 5 April | OSM Lucknow Mapping Party No.3 | Lucknow, Uttar Pradesh, India |
| 7 April | Mapatón humanitario | Zaragoza, Aragon, Spain |
| 7 April | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 7 April | Missing Maps London: (Online) Mapathon [eng] |
| 7 April | Easter 2026 Map n Chat | Dublin, Ireland |
| 8 April | iD Community Chat |
| 8 April | Essen OSM-Treffen | Essen, North Rhine-Westphalia, Germany |
| 9 April | OSM-Vår-pils | Oslo, Norway |
| 9 April | A Synesthete's Atlas: Cartographic Improvisations between Eric Theise, Kenneth Cornell, and Clifford Grindstaff | Albuquerque, New Mexico, United States |
| 10 April | 214. OSM-Stammtisch Berlin-Brandenburg | Berlin, Germany |
| 10 April | 186. OSM-Stammtisch Zürich | Zurich, Zurich, Switzerland |
| 10 April | MSF-CARTONG: Nuit de la Géographie | Paris, Ile-de-France, France |
| 11–12 April | OSM Hackweekend Berlin-Brandenburg 04/2026 | Berlin, Germany |
| 11 April | Braunschweiger Mappertreffen im Stratum 0 Hackerspace | Brunswick, Lower Saxony, Germany |
| 12 April | Social Mapping Sunday: Armadale Train Station | Armadale, Western Australia, Australia |
| 12 April | Editathon e mapathon alla Milano Marathon 2026 | Milan, Lombardy, Italy |
| 12 April | Camera's in kaart brengen | Antwerp, Antwerp, Belgium |
| 12 April | OSMmapperCPH | Copenhagen, Capital Region of Denmark, Denmark |
| 12 April | OSM Delhi Mapping Party No.28 (Meerut) | Meerut, Uttar Pradesh, India |
| 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 |
| 15 April | Une cartopartie dédiée à la mobilité durable dans les Montagnes Béarnaises | Oloron-Sainte-Marie, Nouvelle-Aquitaine, France |
| 15 April | Cartopartie à Oloron-Sainte-Marie - Projet SYSTOUR | Oloron-Sainte-Marie, Nouvelle-Aquitaine, France |
| 15 April | Rencontre des contributeurs de Vienne (38) | Vienne, Auvergne-Rhône-Alpes, France |
| 15 April | Stammtisch Karlsruhe | Karlsruhe, Baden-Württemberg, Germany |
| 15 April | Online Mapathon von ÄRZTE OHNE GRENZEN |
| 16 April | OSM-Treffen Freiburg/Brsg. | Freiburg im Breisgau, Baden-Württemberg, Germany |
| 18 April | Mapping Day ad Empoli | Avane, Empoli, Tuscany, Italy |
| 18 April | OSM-TR Meet-Up - OSM League Pit-Stop | Kadıköy, Turkey |
| 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 | London pub meet-up | City of London, England, United Kingdom |
| 21 April | East Midlands pub meet-up | Derby, England, United Kingdom |
| 21 April | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, Germany |
| 21 April | 199. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 21 April | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 23 April | Capital One TPM Summit Global Mapathon | Richmond, Virginia, United States |
| 23 April | Missing Maps mapathon Bratislava #13 | Bratislava, Region of Bratislava, Slovakia |
| 23 April | Modifichiamo Wiki e OSM insieme! | Catania, Sicily, Italy |
| 24 April | 18. Mapathon & Mapping Party Rapperswil 2026 | Rapperswil, Rapperswil-Jona, St. Gallen, Switzerland |
| 25 April | OSM Mumbai Mapping Party No.9 (Central Line) | Mumbai, Maharashtra, India |
| 27 April | Dubnový Missing Maps mapathon na Ústavu botaniky a zoologie | Brno, South Moravian Region, Czechia |
| 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 |
| 28 April | OSM-Verkehrswende #72 | Berlin, Germany |
| 29 April | OSM-Stammtisch Hannover | Hanover, Lower Saxony, Germany |
| 29 April | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 30 April–3 May | FOSSGIS-OSM-Communitytreffen im Linuxhotel | Essen, North Rhine-Westphalia, Germany |
| 1 May | MA1PING | Stuttgart, Baden-Württemberg, Germany |
| 2 May | Mappando si Vinci! - 2 Maggio 2026 | Spicchio-Sovigliana, Vinci, Tuscany, Italy |
| 2 May | Braunschweiger Mappertreffen im Stratum 0 Hackerspace | Brunswick, Lower Saxony, 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] |
| 6 May | Stuttgarter OpenStreetMap-Treffen | Stuttgart, Baden-Württemberg, Germany |
| 8 May | SOSM Association Annual Meeting | Bergdietikon, Aargau, Switzerland |
| 10 May | OSMmapperCPH | Copenhagen, Capital Region of Denmark, Denmark |
| 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 | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, 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 June | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 2 June | Missing Maps London: (Online) Mapathon [eng] |
| 6 June | Braunschweiger Mappertreffen im Stratum 0 Hackerspace | Brunswick, Lower Saxony, Germany |
| 7 June | OSM India - Monthly Online Mapathon | New Delhi, India |
| 8 June | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 8 June | OpenStreetMap x Wikidata Taipei #89 | Chengnei, Taipei, Taiwan |
| 11–13 June | State of the Map US 2026 | Madison, Wisconsin, United States |
| 11 June | Münchner OSM-Treffen | Munich, Bavaria, Germany |
| 14 June | OSM Delhi Mapping Party No.30 (West Zone) | Delhi, India |
| 16 June | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 16 June | Réunion du groupe local de Lyon | Lyon, Auvergne-Rhône-Alpes, France |
| 16 June | 201. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 16 June | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, Germany |
| 16 June | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 17 June | 21. Österreichischer OSM-Stammtisch (online) | Stainach-Pürgg, Styria, Austria |
| 18 June | Essen OSM-Treffen | Essen, North Rhine-Westphalia, Germany |
| 19 June | Missing Maps Mapathon in Stuttgart | Stuttgart, Baden-Württemberg, Germany |
| 20 June | OSM Mumbai Mapping Party No.11 (Trans-Harbour Line - South) | Maharashtra, India |
| 22 June | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 26–28 June | State of the Map Africa 2025 | Dar es-Salaam, Tanzania |
| 26 June | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 7 July | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 7 July | Missing Maps London: (Online) Mapathon [eng] |
| 13 July | OpenStreetMap x Wikidata Taipei #90 | Chengnei, Taipei, Taiwan |
| 15 July | Online Mapathon von ÄRZTE OHNE GRENZEN |
| 21 July | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 21 July | 202. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 21 July | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, Germany |
| 21 July | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 29 July | 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 |
| 16 August | Kartenwerkstatt Oschatz | Oschatz, Saxony, Germany |
| 18 August | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 18 August | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, Germany |
| 18 August | 203. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 18 August | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 26 August | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 26 August | 79. Wiener OSM-Stammtisch | Vienna, Austria |
| 27 August | OpenStreetMap West Bengal Mapping Party + AnkushTheHero Day |
| 28–30 August | State of the Map 2026 | 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 | 22. Österreichischer OSM-Stammtisch (online) | Stainach-Pürgg, Styria, Austria |
| 15 September | 204. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 15 September | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, Germany |
| 15 September | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 25 September | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 3 October | Essen OSM-Treffen | Essen, North Rhine-Westphalia, Germany |
| 5 October | OpenStreetMap x Wikidata Taipei #93 | Chengnei, Taipei, Taiwan |
| 6 October | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 6 October | Missing Maps London: (Online) Mapathon [eng] |
| 20 October | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 20 October | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, Germany |
| 20 October | 205. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 20 October | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 27–29 October | State of the Map LATAM 2026 | Mexico City, Mexico City, Mexico |
| 27 October | 80. Wiener OSM-Stammtisch | Vienna, Austria |
| 28 October | 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 | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, 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 | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, 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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