Pavel Vladimirovich Vinogradov (Russian: Павел Владимирович Виноградов; born August 31, 1953 in Magadan, USSR) is a cosmonaut and former commander of the International Space Station. As of May 2013, he has flown into space three times, aboard Mir and the International Space Station, and is one of the top 10 astronauts in terms of total time in space. Vinogradov has also conducted seven spacewalks in his cosmonaut career, and holds the record for the oldest person to perform a spacewalk.

Roberto Vittori (born 15 October 1964 in Viterbo) is an Italian air force officer and an ESA astronaut. After graduating from the Italian Accademia Aeronautica in 1989, Vittori flew in the Italian Air Force. He then trained as a test pilot in the United States. In 1998, Vittori was selected by the ESA to join the European Astronaut Corps. Since then, he has participated in three spaceflights: the Soyuz TM-34/33 and Soyuz TMA-6/5 taxi flights to the ISS, as well as STS-134, the penultimate mission of the American Space Shuttle Program. He was the last non-American to fly aboard the shuttle.

Igor Petrovich Volk (Russian: Игорь Петрович Волк; Ukrainian: Ігор Петрович Волк; 12 April 1937 – 3 January 2017) was a cosmonaut and test pilot in the Soviet Union. Igor Volk was selected as a cosmonaut on 12 July 1977 and flew as Research Cosmonaut on Soyuz T-12, the 7th expedition to Salyut 7. One goal of the mission was to test the effects of long-duration spaceflight on Volk's return flight piloting as a precursor to piloting the Space Shuttle Buran. He served as the head of cosmonaut training for the Buran program and after the project's cancellation, as a Flight Tests Deputy at the Gromov Flight Research Institute in 1995 before retiring in 1996. He previously served as President of the National Aero Club of Russia and Vice President of the Fédération Aéronautique Internationale. As recognition for his contributions as a test pilot and cosmonaut he was awarded the Hero of the Soviet Union on 29 July 1984.

Aleksandr Aleksandrovich Volkov (Russian: Алекса́ндр Алекса́ндрович Во́лков, born 27 May 1948) is a retired Russian cosmonaut. He is a veteran of 3 space flights, including twice to the Mir Soviet space station, and is the father of cosmonaut Sergey Volkov.

Sergey Aleksandrovich Volkov is a retired Russian cosmonaut and engineer. He was a member of three missions to the International Space Station, spending more than a year in total in space. During his missions he did four spacewalks lasting more than 23 hours in total. Volkov retired from the Cosmonaut group in February 2017.

Vladislav Nikolayevich Volkov (Russian: Владисла́в Никола́евич Во́лков; November 23, 1935 – June 30, 1971) was a Soviet cosmonaut who flew on the Soyuz 7 and Soyuz 11 missions. The second mission terminated fatally. Volkov, on his second space mission in 1971, was assigned to Soyuz 11. The three cosmonauts on this flight spent 23 days on Salyut 1, the world's first space station. After three relatively placid weeks in orbit, however, Soyuz 11 became the second Soviet space flight to terminate fatally, after Soyuz 1. After a normal re-entry, the Soyuz 11 capsule was opened and the corpses of the three crew members were found inside. It was discovered that a valve had opened just prior to leaving orbit that had allowed the capsule's atmosphere to vent away into space, causing Volkov and his two flight companions to suffer fatal hypoxia as their cabin descended toward the earth's atmosphere.

Boris Valentinovich Volynov (Russian: Бори́с Валенти́нович Волы́нов; born 18 December 1934) is a Soviet cosmonaut who flew two space missions of the Soyuz programme: Soyuz 5, and Soyuz 21. He was the first Jewish cosmonaut to enter space, preceding Judith Resnik in the United States.

Koichi Wakata (若田 光一 Wakata Kōichi, born 1 August 1963) is a Japanese engineer and a JAXA astronaut. Wakata is a veteran of four NASA Space Shuttle missions, a Russian Soyuz mission, and a long-duration stay on the International Space Station. During a nearly two-decade career in spaceflight, he has logged more than eleven months in space. During Expedition 39, he became the first Japanese commander of the International Space Station. Wakata flew on the Soyuz TMA-11M/Expedition 38/Expedition 39 long duration spaceflight from 7 November 2013 to 13 May 2014. During this spaceflight he was accompanied by Kirobo, the first humanoid robot astronaut.

Prof. Dr. Ulrich Hans Walter (born February 9, 1954) is a German physicist/engineer and a former DFVLR astronaut. In 1993, he flew on board the Space Shuttle Columbia on mission STS-55 (Spacelab D-2) as a Payload Specialist. He spent 9 days, 23 hours, and 40 minutes in space.

Colonel Wang Yaping is a Chinese military pilot and astronaut. Wang was the second female astronaut to be named by the CNSA, and the second Chinese woman in space. She was a candidate for the space mission Shenzhou 9 in 2012. However, Liu Yang was selected over her for the historic mission of the first Chinese female space traveller. Wang was a member of the backup crew for SZ-9. Wang became the second Chinese female astronaut as a member of the Shenzhou 10 spaceship crew, which orbited the earth in June 2013, and of the Tiangong-1 orbiting space station with which it docked. She was the first member of the crew announced, in April, while the remainder of the crew were announced in June. Wang Yaping was one of two women in space on the 50th anniversary of Vostok 6, the first spaceflight by a woman, Valentina Tereshkova. The other woman in space on 16 June 2013 was Karen Nyberg, an American astronaut aboard the International Space Station. While aboard Tiangong-1, Wang conducted scientific experiments and taught a physics lesson to Chinese students by live television broadcast.

Dafydd Rhys "Dave" Williams OC (born May 16, 1954) is a Canadian physician, public speaker and a retired CSA astronaut. Williams was a mission specialist on two space shuttle missions. His first spaceflight, STS-90 in 1998, was a 16-day mission aboard Space Shuttle Columbia dedicated to neuroscience research. His second flight, STS-118 in August 2007, was flown by Space Shuttle Endeavour to the International Space Station. During that mission he performed three spacewalks, becoming the third Canadian to perform a spacewalk and setting a Canadian record for total number of spacewalks. These spacewalks combined for a total duration of 17 hours and 47 minutes.

Naoko Yamazaki is a former Japanese astronaut at JAXA, the second Japanese woman to qualify for the program. The first was Chiaki Mukai.