Pakistani selectors are known to throw young blood in International cricket lot more than other countries in the world and hence, we see 6 Pakistani batsman featuring in century list by youngest batsman.
Country-wise : If you look the list below closely, you'll find batsman from Pakistan, Bangladesh, Ireland, Srilanka, West Indies and rounding off with India's Vinod Kambli who scored a century on his 21st Birthday.. but who are the batsman from other country, the youngest ones, to get to hundred? here's Sthe missing names :-
Youngest Australia batsman to score an ODI century = Ricky Ponting = 21 year & 28 days.
Youngest England batsman to score an ODI century = David Gower = 21 year & 55 days.
Youngest South Africa batsman to score an ODI century = Jacques Kallis = 22 year & 92 days.
Youngest New Zealand batsman to score an ODI century = Martin Crowe = 21 year & 156 days.
Youngest Zimbabwe batsman to score an ODI century = Sean Ervine = 21 year & 49 days.
|Shahid Afridi (Pak)||16y 217d||102||Sri Lanka||Nairobi||4 Oct 1996|
|Imran Nazir (Pak)||18y 121d||105*||Zimbabwe||St George||15 Apr 2000|
|Saleem Elahi (Pak)||18y 312d||102*||Sri Lanka||Gujranwala||29 Sep 1995|
|Tamim Iqbal (Bdesh)||19y 2d||129||Ireland||Dhaka||22 Mar 2008|
|Umar Akmal (Pak)||19y 73d||102*||Sri Lanka||Colombo||7 Apr 2009|
|Shakib Al Hasan (Bdesh)||19y 341d||134*||Canada||St Johns||28 Feb 2007|
|Shoaib Mallik (Pak)||20y 14d||111*||West Indies||Sharjah||15 Febr 2002|
|Salman Butt (Pak)||20y 37d||108*||India||Kolkata||13 Nov 2004|
|Ijaz Ahmed (Pak)||20y 39d||124*||Bangladesh||Chittagong||29 Oct 1988|
|Eoin Morgan (Ire)||20y 147d||115||Canada||Nairobi||4 Feb 2007|
|Mehrab Hossain (Bdesh)||20y 184d||101||Zimbabwe||Dhaka||25 Mar 1999|
|Shahriar Nafees (Bdesh)||20y 193d||118*||Zimbabwe||Harare||6 Aug 2006|
|Upul Tharanga (SL)||20y 212d||105||Bangladesh||Colombo||2 Sep 2005|
|Ricardo Powell (WI)||20y 266d||124||India||Singapore||8 Sep 1999|
|Faisal Iqbal (Pak)||20y 335d||100*||Zimbabwe||Harare||30 Nov 2002|
|Md Ashraful (Bdesh)||20y 346d||100||Australia||Cardiff||18 Jun 2005|
|Vinod Kambli (India)||21y 00d||100*||England||Jaipur||18 Jan 1993|