During the MIR Station operation absolute world records of man's continuous on-orbit stay-time were achieved:

1987 - Yuri Romanenko (326 days 11 hrs 38 min)
1988 - Vladimir Titov, Musa Manarov (365 days 22 hrs 39 min)
1995 - Valery Polyakov (437 days 17 hrs 58 min).

In 1995 Valery Polyakov also became an absolute world record-breaker in total on-orbit stay time, in 1999 his achievement was exceeded by Sergey Avdeev:

Valery Polyakov - 678 days 16 hrs 33 min (for 2 flights)
Sergey Avdeev - 747 days 14 hrs 12 min (for 3 flights).

Among women world records of space flight duration were achieved by:

Elena Kondakova (169 days 05 h 1 min) in 1995
Shannon Lucid, the USA (188 days 04 hrs 00 min, including a stay-time on the MIR Station of 183 days 23 hrs 00 min) in 1996.

Among foreign citizens the most long-duration flights under
the MIR Program were performed by:

Egresses into Space

78 egresses into space were performed on the MIR Orbital Station (including three egresses into the unpressurized Spektr module) of a total duration of 359 hrs 12 min.

Spacewalks were performed by:
29 Russian cosmonauts
3 U.S. astronauts
2 French astronauts
1 ESA astronaut (citizen of Germany).

Cosmonauts who performed six and more egresses into space
on the MIR Station