Top Sustainability Conferences in 2026

The most prominent sustainability conferences on the calendar in 2026, ranked by expected attendance so you can prioritize where to spend your travel budget.

  1. 1

    International Conference on Lifelong Learning for Sustainable Careers

    ConferenceMay 2–3, 2026Las vegas, US
  2. 2

    International Conference on Lifelong Learning for Sustainable Careers

    ConferenceMay 2–3, 2026US
  3. 3

    International Conference on Sustainable Development and Educational Innovation

    ConferenceJun 1–2, 2026US
  4. 4

    International Conference on Sustainable Transportation Systems and Infrastructure

    ConferenceJun 1–2, 2026Seattle, US
  5. 5

    International Conference on Sustainable Development and Educational Innovation

    ConferenceJun 1–2, 2026US
  6. 6

    International Conference on Sustainable Transportation Systems and Infrastructure

    ConferenceJun 1–2, 2026Seattle, US
  7. 7

    International Conference on GIS and Sustainable Agriculture Practices

    ConferenceJul 1–2, 2026Miami, US
  8. 8

    International Conference on GIS and Sustainable Agriculture Practices

    ConferenceJul 1–2, 2026US
  9. 9

    International Conference on Groundwater Sustainability and Recharge Methods

    ConferenceJul 1–2, 2026US
  10. 10

    International Conference on Groundwater Sustainability and Recharge Methods

    ConferenceJul 1–2, 2026US
  11. 11

    International Conference on Epidemiology, Global Health and Sustainability

    ConferenceJul 1–2, 2026Chicago, US
  12. 12

    International Conference on Community-Based Sustainability and Local Action Plans

    ConferenceJul 1–2, 2026Washington DC, US
  13. 13

    International Conference on Community-Based Sustainability and Local Action Plans

    ConferenceJul 1–2, 2026US
  14. 14

    International Conference on Epidemiology, Global Health and Sustainability

    ConferenceJul 1–2, 2026US
  15. 15

    International Conference on Sustainable Manufacturing and Green Chemistry

    ConferenceJul 1–2, 2026Philadelphia, US
  16. 16

    International Conference on Sustainable Manufacturing and Green Chemistry

    ConferenceJul 1–2, 2026US
  17. 17

    International Conference on Green Computing and Sustainable IT

    ConferenceAug 1–2, 2026US
  18. 18

    International Conference on Green Computing and Sustainable IT

    ConferenceAug 1–2, 2026US
  19. 19

    International Conference on Green Catalysis and Sustainable Chemical Processes

    ConferenceSep 1–2, 2026Las vegas, US
  20. 20

    International Conference on Green Catalysis and Sustainable Chemical Processes

    ConferenceSep 1–2, 2026US
  21. 21

    International Conference on Sustainable Pest Management and Ecological Balance

    ConferenceOct 1–2, 2026US
  22. 22

    International Conference on Sustainable Pest Management and Ecological Balance

    ConferenceOct 1–2, 2026Las vegas, US
  23. 23

    International Conference on Urban Governance and Sustainable Strategies

    ConferenceNov 2–3, 2026Chicago, US
  24. 24

    International Conference on Urban Governance and Sustainable Strategies

    ConferenceNov 2–3, 2026US

How this list is built

We rank by expected attendance because it's the closest proxy we have for prominence — bigger events draw bigger speakers, more sponsors, and (usually) more substantive deal flow. Where attendance isn't known, the event drops below ranked entries even if it's well-regarded. If you want raw inventory instead of a curated list, the sustainability conferences hub has every event in the database, not just the top 25.

Total in this category: 24 events.