| 4 apirila | A Synesthete's Atlas: Cartographic Improvisations between Eric Theise, Jeffrey Gordon Evans, Hannah Joyce, and Steev Hise | Tucson, Arizona, United States |
| 5 apirila | OSM Lucknow Mapping Party No.3 | Lucknow, Uttar Pradesh, India |
| 7 apirila | Mapatón humanitario | Zaragoza, Aragon, Spain |
| 7 apirila | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 7 apirila | Shockoe Hill Cemetery mapping with MapRVA | Richmond, Virginia, United States |
| 7 apirila | Missing Maps London: (Online) Mapathon [eng] |
| 7 apirila | Easter 2026 Map n Chat | Dublin, Ireland |
| 8 apirila | iD Community Chat |
| 8 apirila | Essen OSM-Treffen | Essen, North Rhine-Westphalia, Germany |
| 9 apirila | OSM-Vår-pils | Oslo, Norway |
| 9 apirila | A Synesthete's Atlas: Cartographic Improvisations between Eric Theise, Kenneth Cornell, and Clifford Grindstaff | Albuquerque, New Mexico, United States |
| 10 apirila | 214. OSM-Stammtisch Berlin-Brandenburg | Berlin, Germany |
| 10 apirila | 186. OSM-Stammtisch Zürich | Zurich, Zurich, Switzerland |
| 10 apirila | MSF-CARTONG: Nuit de la Géographie | Paris, Ile-de-France, France |
| 11–12 apirila | OSM Hackweekend Berlin-Brandenburg 04/2026 | Berlin, Germany |
| 11 apirila | Braunschweiger Mappertreffen im Stratum 0 Hackerspace | Brunswick, Lower Saxony, Germany |
| 12 apirila | Editathon e mapathon alla Milano Marathon 2026 | Milan, Lombardy, Italy |
| 12 apirila | Social Mapping Sunday: Armadale Train Station | Armadale, Western Australia, Australia |
| 12 apirila | Camera's in kaart brengen | Antwerp, Antwerp, Belgium |
| 12 apirila | OSMmapperCPH | Copenhagen, Capital Region of Denmark, Denmark |
| 12 apirila | OSM Delhi Mapping Party No.28 (Meerut) | Meerut, Uttar Pradesh, India |
| 13 apirila | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 13 apirila | OpenStreetMap x Wikidata Taipei #87 | Chengnei, Taipei, Taiwan |
| 14 apirila | Münchner OSM-Treffen | Munich, Bavaria, Germany |
| 15 apirila | Une cartopartie dédiée à la mobilité durable dans les Montagnes Béarnaises | Oloron-Sainte-Marie, Nouvelle-Aquitaine, France |
| 15 apirila | Cartopartie à Oloron-Sainte-Marie - Projet SYSTOUR | Oloron-Sainte-Marie, Nouvelle-Aquitaine, France |
| 15 apirila | Rencontre des contributeurs de Vienne (38) | Vienne, Auvergne-Rhône-Alpes, France |
| 15 apirila | Stammtisch Karlsruhe | Karlsruhe, Baden-Württemberg, Germany |
| 15 apirila | Online Mapathon von ÄRZTE OHNE GRENZEN |
| 16 apirila | OSM-Treffen Freiburg/Brsg. | Freiburg im Breisgau, Baden-Württemberg, Germany |
| 18 apirila | Mapping Day ad Empoli | Avane, Empoli, Tuscany, Italy |
| 18 apirila | OSM-TR Meet-Up - OSM League Pit-Stop | Kadıköy, Turkey |
| 19 apirila | Mapping Party @ Chennai | Chennai, Tamil Nadu, India |
| 21 apirila | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 21 apirila | Réunion du groupe local de Lyon | Lyon, Auvergne-Rhône-Alpes, France |
| 21 apirila | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, Germany |
| 21 apirila | East Midlands pub meet-up | Derby, England, United Kingdom |
| 21 apirila | 199. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 21 apirila | London pub meet-up | City of London, England, United Kingdom |
| 21 apirila | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 23 apirila | Capital One TPM Summit Global Mapathon | Richmond, Virginia, United States |
| 23 apirila | Missing Maps mapathon Bratislava #13 | Bratislava, Region of Bratislava, Slovakia |
| 23 apirila | MapRVA Virtual Map & Yap with LaToya Gray-Sparks, VA DHR | Richmond, Virginia, United States |
| 23 apirila | Modifichiamo Wiki e OSM insieme! | Catania, Sicily, Italy |
| 24 apirila | 18. Mapathon & Mapping Party Rapperswil 2026 | Rapperswil, Rapperswil-Jona, St. Gallen, Switzerland |
| 25 apirila | Hamburger Mapping-Spaziergang (in Pinneberg) | Pinneberg, Schleswig-Holstein, Germany |
| 25 apirila | OSM Mumbai Mapping Party No.9 (Central Line) | Mumbai, Maharashtra, India |
| 27 apirila | Dubnový Missing Maps mapathon na Ústavu botaniky a zoologie | Brno, South Moravian Region, Czechia |
| 27 apirila | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 28 apirila | 78. Wiener OSM-Stammtisch | Vienna, Austria |
| 28 apirila | Kieler Mapper*innentreffen | Kiel, Schleswig-Holstein, Germany |
| 28 apirila | OSM-Verkehrswende #72 | Berlin, Germany |
| 29 apirila | OSM-Stammtisch Hannover | Hanover, Lower Saxony, Germany |
| 29 apirila | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 30 apirila–3 maiatza | FOSSGIS-OSM-Communitytreffen im Linuxhotel | Essen, North Rhine-Westphalia, Germany |
| 1 maiatza | MA1PING | Stuttgart, Baden-Württemberg, Germany |
| 2 maiatza | Mappando si Vinci! - 2 Maggio 2026 | Spicchio-Sovigliana, Vinci, Tuscany, Italy |
| 2 maiatza | Braunschweiger Mappertreffen im Stratum 0 Hackerspace | Brunswick, Lower Saxony, Germany |
| 3 maiatza | OSM India - Monthly Online Mapathon | New Delhi, India |
| 5 maiatza | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 5 maiatza | Missing Maps London: (Online) Mapathon [eng] |
| 6 maiatza | Stuttgarter OpenStreetMap-Treffen | Stuttgart, Baden-Württemberg, Germany |
| 7 maiatza | Surveillance mapping with MapRVA | Richmond, Virginia, United States |
| 8 maiatza | SOSM Association Annual Meeting | Bergdietikon, Aargau, Switzerland |
| 10 maiatza | OSMmapperCPH | Copenhagen, Capital Region of Denmark, Denmark |
| 10 maiatza | OSM Delhi Mapping Party No.29 (South Zone) | Delhi, India |
| 11 maiatza | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 11 maiatza | OpenStreetMap x Wikidata Taipei #88 | Chengnei, Taipei, Taiwan |
| 13 maiatza | Münchner OSM-Treffen | Munich, Bavaria, Germany |
| 16 maiatza | OSM Mumbai Mapping Party No.10 (Trans-Harbour Line - North) | Navi Mumbai, Maharashtra, India |
| 19 maiatza | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 19 maiatza | Réunion du groupe local de Lyon | Lyon, Auvergne-Rhône-Alpes, France |
| 19 maiatza | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, Germany |
| 19 maiatza | 200. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 19 maiatza | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 25 maiatza | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 27 maiatza | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 2 ekaina | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 2 ekaina | Missing Maps London: (Online) Mapathon [eng] |
| 6 ekaina | Braunschweiger Mappertreffen im Stratum 0 Hackerspace | Brunswick, Lower Saxony, Germany |
| 7 ekaina | OSM India - Monthly Online Mapathon | New Delhi, India |
| 8 ekaina | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 8 ekaina | OpenStreetMap x Wikidata Taipei #89 | Chengnei, Taipei, Taiwan |
| 11–13 ekaina | State of the Map US 2026 | Madison, Wisconsin, United States |
| 11 ekaina | Münchner OSM-Treffen | Munich, Bavaria, Germany |
| 14 ekaina | OSM Delhi Mapping Party No.30 (West Zone) | Delhi, India |
| 16 ekaina | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 16 ekaina | Réunion du groupe local de Lyon | Lyon, Auvergne-Rhône-Alpes, France |
| 16 ekaina | 201. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 16 ekaina | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, Germany |
| 16 ekaina | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 17 ekaina | 21. Österreichischer OSM-Stammtisch (online) | Stainach-Pürgg, Styria, Austria |
| 18 ekaina | Essen OSM-Treffen | Essen, North Rhine-Westphalia, Germany |
| 19 ekaina | Missing Maps Mapathon in Stuttgart | Stuttgart, Baden-Württemberg, Germany |
| 20 ekaina | OSM Mumbai Mapping Party No.11 (Trans-Harbour Line - South) | Maharashtra, India |
| 22 ekaina | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 26–28 ekaina | State of the Map Africa 2025 | Dar es-Salaam, Tanzania |
| 26 ekaina | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 7 uztaila | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 7 uztaila | Missing Maps London: (Online) Mapathon [eng] |
| 13 uztaila | OpenStreetMap x Wikidata Taipei #90 | Chengnei, Taipei, Taiwan |
| 15 uztaila | Online Mapathon von ÄRZTE OHNE GRENZEN |
| 21 uztaila | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 21 uztaila | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, Germany |
| 21 uztaila | 202. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 21 uztaila | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 29 uztaila | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 4 abuztua | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 4 abuztua | Missing Maps London: (Online) Mapathon [eng] |
| 10 abuztua | OpenStreetMap x Wikidata Taipei #91 | Chengnei, Taipei, Taiwan |
| 16 abuztua | Kartenwerkstatt Oschatz | Oschatz, Saxony, Germany |
| 18 abuztua | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 18 abuztua | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, Germany |
| 18 abuztua | 203. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 18 abuztua | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 26 abuztua | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 26 abuztua | 79. Wiener OSM-Stammtisch | Vienna, Austria |
| 27 abuztua | OpenStreetMap West Bengal Mapping Party + AnkushTheHero Day |
| 28–30 abuztua | State of the Map 2026 | Champs-sur-Marne, Ile-de-France, France |
| 28 abuztua | Essen OSM-Treffen | Essen, North Rhine-Westphalia, Germany |
| 1 iraila | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 1 iraila | Missing Maps London: (Online) Mapathon [eng] |
| 7 iraila | OpenStreetMap x Wikidata Taipei #92 | Chengnei, Taipei, Taiwan |
| 15 iraila | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 15 iraila | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, Germany |
| 15 iraila | 204. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 15 iraila | 22. Österreichischer OSM-Stammtisch (online) | Stainach-Pürgg, Styria, Austria |
| 15 iraila | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 25 iraila | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 3 urria | Essen OSM-Treffen | Essen, North Rhine-Westphalia, Germany |
| 5 urria | OpenStreetMap x Wikidata Taipei #93 | Chengnei, Taipei, Taiwan |
| 6 urria | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 6 urria | Missing Maps London: (Online) Mapathon [eng] |
| 20 urria | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 20 urria | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, Germany |
| 20 urria | 205. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 20 urria | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 27–29 urria | State of the Map LATAM 2026 | Mexico City, Mexico City, Mexico |
| 27 urria | 80. Wiener OSM-Stammtisch | Vienna, Austria |
| 28 urria | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 3 azaroa | Missing Maps London: (Online) Mapathon [eng] |
| 7 azaroa | Maker Days Salzburg | Salzburg, Salzburg, Austria |
| 9 azaroa | OpenStreetMap x Wikidata Taipei #94 | Chengnei, Taipei, Taiwan |
| 17 azaroa | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 17 azaroa | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, Germany |
| 17 azaroa | 206. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 17 azaroa | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 25 azaroa | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
| 1 abendua | OSM-Treffpunkt | Salzburg, Salzburg, Austria |
| 1 abendua | Missing Maps London: (Online) Mapathon [eng] |
| 7 abendua | OpenStreetMap x Wikidata Taipei #95 | Chengnei, Taipei, Taiwan |
| 9 abendua | 23. Österreichischer OSM-Stammtisch (online) | Stainach-Pürgg, Styria, Austria |
| 13 abendua | Essen OSM-Treffen | Essen, North Rhine-Westphalia, Germany |
| 15 abendua | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 15 abendua | 207. OSM-Stammtisch Bonn | Bonn, North Rhine-Westphalia, Germany |
| 15 abendua | OSM-Stammtisch Chemnitz | Chemnitz, Saxony, Germany |
| 15 abendua | Lüneburger Mappertreffen (online) | Lüneburg, Lower Saxony, Germany |
| 18 abendua | Düsseldorfer OpenStreetMap-Treffen (online) | Dusseldorf, North Rhine-Westphalia, Germany |
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