The state election commission announced the result after total vote count on Monday Jul 5. Komorowski defeated Jaroslaw Kaczynski of the right-wing Law and Justice party.
Komorowski was the acting president of Poland after the death of President Lech Kaczynski in an air crash on saturday, Apr 10 in Russia along with his wife Maria and 96 other top Polish officials.
Komorowski gained 53.01 percent of the vote and his opponent Jaroslaw Kaczynski, twin brother of Lech Kaczynski, received 46.99 percent of the vote.
The two candidates fought a bitter election and divided the Polish nation between the Centrist forces led by Prime Minister Donald Tusk and the ultra-rightist forces led by Kaczynski.
Results showed that larger cities had mostly voted for Komorowski and smaller cities and rural areas voted largely for Kaczynski.
Russian President Dmitry Medvedev and German president Christian Wulff congratulated the new Polish President.