Adam Kszczot was born and raised in Opoczno by his parents, mother Ewa - a former mathematics teacher and father Stanisław Kszczot, a carpenter. He has two sisters, Agata and Ewa. His older brother Jacek died at age 17 as a result of electric shock during agricultural work.[2] He graduated from the Lodz University of Technology in Management. In October 2014 he married Renata (nee Borkowska).[3] In October 2017 his wife gave birth to their son named Ignacy.
Kszczot broke Paweł Czapiewski's 10-year-old Polish indoor record at the 2012 Meeting Pas de Calais. His time of 1:44.57 made him the third fastest indoor runner ever after Wilson Kipketer and Yuriy Borzakovskiy. Vazel, Pierre-Jean (2012-02-15). With this result Kszczot went to the 2012 World Indoor Championships as a medal favourite. However, he finished a disappointing fourth. In his Olympic debut in London he placed third in his semifinal round, failing to qualify for the final.
He started well the 2013 season by successfully defending his title at the European Indoor Championships, the first man to do so in 42 years.
On March 3, 2018 Kszczot claimed his first title of World Indoor Champion in the 800 meters.[7] He controlled the final run, the pace of which was quite slow and won with a large advantage over American Drew Windle and Spanish Saúl Ordóñez. He dedicated his gold medal to his 5-month-old son Ignacy. In August, Kszczot added the European outdoor title at the event.
