Meetup's live worldwide topic page for product design: an auto-updating list of local Meetup groups tagged "Product Design," currently spanning roughly 487,000 members across 554 groups.
The value is purely as a discovery layer for in-person, local events: this isn't an editorially curated list, it's Meetup's own topic filter surfacing whatever local organisers have tagged under product design.
Best for designers wanting in-person, local connection over another online community: search your own city from the topic page rather than expecting a global calendar.
The topic is "Product Design," not "Design Thinking" specifically, and coverage depends entirely on local organisers: some cities have thriving groups, others barely post.
The largest design thinking meetup groups, in one place.