Rođen 20. januara 1964 god. u Sarajevu, gdje se redovno školovao i diplomirao na Pravnom fakultetu Univerziteta u Sarajevu. Tokom školovanja bio aktivan u studentskom pokretu. Završio Georgetown Leadership Seminar (Edmund A. Walsh School of Foreign Service, Georgetown University,Washington, D.C.)

U 1992 godini radio kao diplomirani pravnik u Zavodu za mirovinsko osiguranje BiH. Odmah nakon agresije na BiH dobrovoljno pristupio u redove Armije BiH, pokazao izuzetnu hrabrost u odbrani Sarajeva i odlikovan najvišim ratnim odlikovanjem "Zlatni ljiljan". U vojsci dobio čin natporučnika i na vlastiti zahtijev demobilisan početkom 1996 godine.

Od 1996 do 1998 godine radio u Ministarstvu za raseljena lica i izbjeglice Federacije BiH. Aktivno politički djeluje u Socijaldemokratskoj partiji BiH i biva izabran za vijećnika grada Sarajeva.

Od 1998 do 2000 godine obavlja dužnost predsjednika Gradskog vijeća grada Sarajeva.

Na lokalnim izborima 2000 godine izabran je za vijećnika, a potom za načelnika općine Novo Sarajevo, gdje ostaje na dužnosti do jeseni 2001 godine.

Nakon uspostave diplomatskih odnosa BiH sa Saveznom Republikom Jugoslavijom, 2001 godine postavljen je na dužnost prvog izvanrednom i opunomoćenog ambasadora BiH u Beogradu. U proljeće 2003 godine dao je ostavku na dužnost ambasadora BiH u SRJ u znak neslaganja sa nacionalističkim konceptom vlasti u BiH.

Izabran u najuže rukovodstvo Socijaldemokratske partije Bosne i Hercegovine.

Od 2003 do 2004 godine obavljao dužnost zamjenika gradonačelnika Grada Sarajeva.

Na lokalnim izborima 2004 godine pobijedio i izabran za načelnika općine Novo Sarajevo.

Na kongresu SDP BiH izabran za dopredsjednika Socijaldemokratske partije Bosne i Hercegovine, koju dužnost i sada obnaša.

Na općim izborima 2006 godine u BiH kandidirao se za člana Predsjedništva Bosne i Hercegovine iz reda hrvatskog naroda, pobijedio i izabran na dužnost člana Predsjedništva BiH sa četvorogodišnjim mandatom, počev od 01.oktobra 2006 godine.
Dužnost predsjedavajućeg Predsjedništva BiH preuzeo je 06. jula 2007 godine.

Nosilac je odlikovanja Svete stolice Commando con placca dell'Ordine Piano.

Gospodin Komšić je počasni građanin St. Louisa (Missouri, USA) i El Pasa, (Texas, SAD).

Oženjen je i otac jedne kćerke.

Živi u Sarajevu, bio je aktivni sportista, dosta vremena posvećuje društvenim i humanitarnim aktivnostima, a rado je viđen među svojim sugrađanima.

U Sarajevu, novembar 2009 godine

Mr. Komšić was born on January 20, 1964, in Sarajevo where he completed his education, receiving his law degree from the University of Sarajevo. During his schooling he was active in the student movement. He is an alumnus of the Georgetown Leadership Seminar (Edmund A. Walsh School of Foreign Service, Georgetown University,Washington, D.C.).

In 1992 Mr. Komšić was working as a lawyer at the Institute for Pension Insurance of Bosnia and Herzegovina. Immediately after the beginning of the aggression against Bosnia and Herzegovina he voluntarily joined the Army of the Republic of Bosnia and Herzegovina, demonstrating exceptional bravery in defending Sarajevo and received the «Zlatni ljiljan» ("Golden Lilly"), the highest military decoration awarded by the Army of the Republic of Bosnia and Herzegovina. In the army he attained the rank of First Lieutenant and in 1996 he was demobilized at his own request.

From 1996 to 1998 he was employed at the Federal Ministry for Displaced Persons and Refugees. Mr. Komšić embarked upon an active political career as a member of the Social Democratic Party of BH and was elected a member of the City Council of Sarajevo.

From 1998 to 2000 he was the President of the City Council of Sarajevo.

In the 2000 local elections he was elected Mayor of the Municipality of Novo Sarajevo, a position he held till the autumn of 2001.

Following the establishment of diplomatic relations between Bosnia and Herzegovina and the Federal Republic of Yugoslavia, in 2001 he was appointed as the first Ambassador Extraordinary and Plenipotentiary of Bosnia and Herzegovina to Belgrade. In the spring of 2003 he resigned from the post of BH Ambassador to the FR of Yugoslavia as a gesture of disapproval towards the nationalist concept of governance in Bosnia and Herzegovina.

Mr. Komšić was elected into the top party leadership of the Social Democratic Party of Bosnia and Herzegovina.

From 2003 to 2004 he performed the duties of Deputy Mayor of the City of Sarajevo.

Mr. Komšić won the 2004 local elections, becoming Mayor of the Municipality of Novo Sarajevo.

At the Party Congress he was elected vice-president of the Social Democratic Party of Bosnia and Herzegovina, a position he still holds today.

In the general election held in 2006 he ran as a candidate for the Croat member of the Presidency of Bosnia and Herzegovina. Mr. Komšić emerged victorious and was elected to a four-year term as a member (chairman) of the Presidency of Bosnia and Herzegovina.
Mr. Komšić took over the chairmanship of the Presidency of Bosnia and Herzegovina on July 6, 2009.

Mr. Komšić was awarded the decoration of Commander "Order of Piano" of the Holy See, he is an Honorary Citizen of St. Louis (Missouri, USA) and El Paso (Texas, USA) and the recipient of numerous civic awards and recognitions.

He speaks English.

Mr. Komšić lives in Sarajevo. He is married and is a father of one daughter.

In Sarajevo, July, 2009