This is a list of all of the visitors to the International Space Station (ISS), including long-term crew, short-term visitors, and space tourists, in alphabetical order. ISS crew names are in bold. The suffix (twice, thrice, ...) refers to the individual's number of spaceflights to the ISS, not his or her total number of spaceflights. Entries without a flag symbol indicate that the individual was an American citizen at launch. Entries without a female symbol () are men.
As of July 28, 2017[update], 227 individuals have made 393 spaceflights to the ISS, including the six people currently at the ISS (Expion 56). Two men made five spaceflights to the ISS, while five people made four, 29 people made three and 85 people made two. Note that this list assigns individuals with dual citizenship to their country of primary residence at time of launch (for example, the Iranian-American space tourist Anousheh Ansari is only listed under the United States).
All private space travel is aboard the Russian Soyuz spacecraft. When only two crew members are required in the three seat Soyuz, and additional cargo is not sent, the additional seat is sold to the general public through Space Adventures. Private travelers remain on the ISS during handover from one expion crew to the next, generally a week or two. The NASA Space Shuttle carried seven crew members, and the longest docking with the ISS was 11 days. Many visitors to the ISS were accommodated for short periods during NASA shuttle dockings. NASA stated it was "not interested" in private spaceflight from the beginning of the ISS and has not changed its position.
|United States||257||143||28 women, six tourists, 62 double, 20 triple and four quadruple flyers|
|Russia||85||46||one woman, 16 double, six triple, one quadruple and two quintuple flyers|
|Japan||12||8||one woman, two double and one triple flyer|
|Canada||9||7||one woman, two double flyers, one tourist|
|Italy||9||5||one woman, two triple flyers|
|Belgium||2||1||one double flyer|
|Netherlands||2||1||one double flyer|
|Sweden||2||1||one double flyer|
|South Africa||1||1||one tourist|
|South Korea||1||1||one woman|
|Total||393||227||34 women, 7 tourists, 85 double, 29 triple, five quadruple and two quintuple flyers|
|NASA||251||138||51||27 women, 61 double, 20 triple and four quadruple flyers|
|Roscosmos||84||46||39||one woman, 15 double, six triple, one quadruple and two quintuple flyers|
|ESA||24||17||10||two women, three double flyers and two triple flyers|
|JAXA||12||8||6||one woman, two double and one triple flyer|
|CSA||8||6||2||one woman, two double flyers|
|CNES||1||1||-||Philippe Perrin later joined ESA|
|Tourists||8||7||-||one woman, one double flyer|
|Total||393||227||108||34 women, 85 double, 29 triple, five quadruple and two quintuple flyers|