| 21st December | Jahresabschlussmapping | Fulda, Hesse, Germany |
| 22nd December | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 22nd December | Bremer Mappertreffen | Bremen, Bremen, Germany |
| 27th–30th December | OSM@39c3 | Hamburg, Germany |
| 27th December | 11th OpenStreetMap West Bengal Mapping Party | Siliguri, West Bengal, India |
| 27th December | OpenStreetMap Belgium at the MAP-Mercator museum | Sint-Niklaas, East Flanders, Belgium |
| 28th December | OSM India×TomTom Online Mapathon | New Delhi, India |
| 3rd January | OpenStreetMap Belgium at the MAP-Mercator museum | Sint-Niklaas, East Flanders, Belgium |
| 3rd January | Braunschweiger Mappertreffen im Stratum0 Hackerspace | Brunswick, Lower Saxony, Germany |
| 4th January | OSM India - Monthly Online Mapathon | New Delhi, India |
| 6th January | Missing Maps London: (Online) Mapathon [eng] |
| 7th January | iD Community Chat |
| 7th January | Stuttgarter OpenStreetMap-Treffen | Stuttgart, Baden-Württemberg, Germany |
| 8th January | OSM-Stammisch Dresden | Dresden, Saxony, Germany |
| 8th January | OpenStreetMap Midwest Meetup | Ohio, United States |
| 8th January | OSM-Treffen in Bochum | Bochum, North Rhine-Westphalia, Germany |
| 9th January | OSMF Engineering Working Group meeting |
| 9th January | Erstes Online-Treffen der OSM-Mapper:innen im Sauerland | Bad Fredeburg, Schmallenberg, North Rhine-Westphalia, Germany |
| 11th January | OSMmapperCPH | Copenhagen, Capital Region of Denmark, Denmark |
| 12th January | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 12th January | OpenStreetMap x Wikidata Taipei #84 | Chengnei, Taipei, Taiwan |
| 17th January | OSM Mumbai Mapping Party No.6 (Mumbai City) | Mumbai, Maharashtra, India |
| 20th January | East Midlands pub meet-up | Derby, England, United Kingdom |
| 20th January | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 20th January | Réunion du groupe local de Lyon | Lyon, Auvergne-Rhône-Alpes, France |
| 20th January | East Midlands pub meet-up | Derby, England, United Kingdom |
| 24th January | State of the Map India 2026 | Nashik, Maharashtra, India |
| 26th January | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 27th January | Kieler Mapper*innentreffen | Kiel, Schleswig-Holstein, Germany |
| 27th January | OSM-Verkehrswende #71 | Berlin, Germany |
| 30th–31st January | Mapping USA 2026 |
| 1st February | OSM India - Monthly Online Mapathon | New Delhi, India |
| 3rd February | Missing Maps London: (Online) Mapathon [eng] |
| 5th February | OSM-Treffen Freiburg/Brsg. | Freiburg im Breisgau, Baden-Württemberg, Germany |
| 7th February | Braunschweiger Mappertreffen im Stratum0 Hackerspace | Brunswick, Lower Saxony, Germany |
| 9th February | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 9th February | OpenStreetMap x Wikidata Taipei #85 | Chengnei, Taipei, Taiwan |
| 11th February | Online Mapathon von ÄRZTE OHNE GRENZEN |
| 17th February | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 17th February | Réunion du groupe local de Lyon | Lyon, Auvergne-Rhône-Alpes, France |
| 21st–22nd February | Karlsruhe Hack Weekend February 2026 | Karlsruhe, Baden-Württemberg, Germany |
| 21st February | OSM Mumbai Mapping Party No.7 (Western Line - South) | Mumbai, Maharashtra, India |
| 23rd February | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 1st March | OSM India - Monthly Online Mapathon | New Delhi, India |
| 3rd March | Missing Maps London: (Online) Mapathon [eng] |
| 9th March | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 16th March | OpenStreetMap x Wikidata Taipei #86 | Chengnei, Taipei, Taiwan |
| 17th March | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 17th March | Réunion du groupe local de Lyon | Lyon, Auvergne-Rhône-Alpes, France |
| 21st March | OSM Mumbai Mapping Party No.8 (Western Line - North) | Vasai-Virar, Maharashtra, India |
| 23rd March | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 24th March | Rencontre OpenStreetMap et Territoires | Plouzané, Brittany, France |
| 28th–29th March | Chemnitzer Linux-Tage 2026 | Chemnitz, Saxony, Germany |
| 5th April | OSM India - Monthly Online Mapathon | New Delhi, India |
| 7th April | Missing Maps London: (Online) Mapathon [eng] |
| 13th April | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 13th April | OpenStreetMap x Wikidata Taipei #87 | Chengnei, Taipei, Taiwan |
| 18th April | OSM Mumbai Mapping Party No.9 (Central Line) | Mumbai, Maharashtra, India |
| 21st April | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 21st April | Réunion du groupe local de Lyon | Lyon, Auvergne-Rhône-Alpes, France |
| 27th April | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 28th April | Kieler Mapper*innentreffen | Kiel, Schleswig-Holstein, Germany |
| 30th April–3rd May | FOSSGIS-OSM-Communitytreffen im Linuxhotel | Essen, North Rhine-Westphalia, Germany |
| 3rd May | OSM India - Monthly Online Mapathon | New Delhi, India |
| 5th May | Missing Maps London: (Online) Mapathon [eng] |
| 11th May | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 11th May | OpenStreetMap x Wikidata Taipei #88 | Chengnei, Taipei, Taiwan |
| 16th May | OSM Mumbai Mapping Party No.10 (Trans-Harbour Line - North) | Navi Mumbai, Maharashtra, India |
| 19th May | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 19th May | Réunion du groupe local de Lyon | Lyon, Auvergne-Rhône-Alpes, France |
| 25th May | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 2nd June | Missing Maps London: (Online) Mapathon [eng] |
| 7th June | OSM India - Monthly Online Mapathon | New Delhi, India |
| 8th June | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 8th June | OpenStreetMap x Wikidata Taipei #89 | Chengnei, Taipei, Taiwan |
| 16th June | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 16th June | Réunion du groupe local de Lyon | Lyon, Auvergne-Rhône-Alpes, France |
| 20th June | OSM Mumbai Mapping Party No.11 (Trans-Harbour Line - South) | Maharashtra, India |
| 22nd June | Missing Maps : Mapathon en ligne - CartONG [fr] |
| 26th–28th June | State of the Map Africa 2025 | Dar es-Salaam, Tanzania |
| 7th July | Missing Maps London: (Online) Mapathon [eng] |
| 13th July | OpenStreetMap x Wikidata Taipei #90 | Chengnei, Taipei, Taiwan |
| 21st July | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 4th August | Missing Maps London: (Online) Mapathon [eng] |
| 10th August | OpenStreetMap x Wikidata Taipei #91 | Chengnei, Taipei, Taiwan |
| 18th August | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 27th August | OpenStreetMap West Bengal Mapping Party + AnkushTheHero Day |
| 1st September | Missing Maps London: (Online) Mapathon [eng] |
| 7th September | OpenStreetMap x Wikidata Taipei #92 | Chengnei, Taipei, Taiwan |
| 15th September | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 5th October | OpenStreetMap x Wikidata Taipei #93 | Chengnei, Taipei, Taiwan |
| 6th October | Missing Maps London: (Online) Mapathon [eng] |
| 20th October | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 3rd November | Missing Maps London: (Online) Mapathon [eng] |
| 9th November | OpenStreetMap x Wikidata Taipei #94 | Chengnei, Taipei, Taiwan |
| 17th November | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
| 1st December | Missing Maps London: (Online) Mapathon [eng] |
| 7th December | OpenStreetMap x Wikidata Taipei #95 | Chengnei, Taipei, Taiwan |
| 15th December | Missing Maps London: (Online) Mid-Month Mapathon [eng] |
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