With the recent Crew-2 docking while Crew-1 was still docked, there were
- Four Crew-1 members
- Four Crew-2 members
- Three Soyuz members
That totals eleven. There have been as many as 13 aboard at once (although the Space Shuttle had the benefit of being able to house all its crew while docked)
What is the maximum occupancy, or has one even been set?