The following players represented their countries at full international level while playing for Reading:
|Alan Bennett||Republic of Ireland||2007|
|Bobby Convey||United States||2004-07|
|Hugh Davey||Northern Ireland||1926-28|
|Ulises de la Cruz||Ecuador||2007|
|Kevin Doyle||Republic of Ireland||2006-09|
|Emerse Faé||Ivory Coast||2008|
|Marcus Hahnemann||United States||2003-05|
|Ray Houghton||Republic of Ireland||1998|
|Noel Hunt||Republic of Ireland||2008|
|Stephen Hunt||Republic of Ireland||2007-09|
|Barry Hunter||Northern Ireland||1997-2000|
|Seol Ki-Hyeon||South Korea||2006-07|
|Shane Long||Republic of Ireland||2007-08|
|Marek Matějovský||Czech Republic||2008|
|Billy McConnell||Northern Ireland||1925-28|
|Jimmy Quinn||Northern Ireland||1993-96|
|Anthony Rougier||Trinidad & Tobago||2000-02|
|Tommy Wright*||Northern Ireland||1996|
In addition, these players have played at under-21 or under-23 level:
|Mikkel Andersen||Denmark U21||2009|
|Grant Brebner||Scotland U21||1998-99|
|Simon Church||Wales U21||2009|
|Kevin Doyle||Republic of Ireland U21||2005|
|Joe Gamble||Republic of Ireland U21||2002|
|Jonathon Hayes||Republic of Ireland U21||2006|
|Leroy Lita||England U21||2006-07|
|Alex Pearce||Scotland U21||2008|
|Steve Sidwell||England U21||2003-04|
|Gylfi Sigurðsson||Iceland U21||2007|
This includes players who were on loan to Reading when they were capped. These are indicated by an asterisk.
Kevin Doyle is Reading's most capped player with 26 caps. Bobby Mikhailov has the most caps overall, earning his 100th Bulgarian cap while at Reading.
Edward Haygarth and Edgar Field are not generally listed as being Reading players at the time of their England caps. However research by Roger Titford has shown that Haygarth played for both Swifts and Reading in 1875, and that Field moved to Reading from Clapham Rovers before previously thought. Haygarth played in Reading's first ever game in 1872 and scored their first ever goal, against Windsor Home Park in 1873. Field belonged to a famous footballing family, having played for Reading alongside his brothers Charles and Herbert.
Bennett, Doyle, Stephen Hunt and Long, along with former Royal Joe Gamble, all appeared for the Republic of Ireland against Ecuador and Bolivia in a tour of the United States in 2007. Former loanee Nick Colgan also appeared against Bolivia. Doyle, Long and both Hunt brothers played against Poland the following year.
Bobby Convey was the first Reading player to appear in the World Cup finals when he played for the United States in 2006. He started their group games against the Czech Republic and Italy, and came on as a substitute against Ghana. Marcus Hahnemann was also in the American squad, but did not make it onto the pitch.
Leroy Lita played in all four games for the England under-21 team that reached the semi-finals of the European Championships in 2007, scoring three times.
Denis Allen played a couple of games for Malaya while on National Service, but these were not official internationals. In addition to those above, a number of players, including Herbert Smith, Joe Bailey and Maurice Edelston, have played amateur internationals, including for the Great Britain Olympics team.