Dovid Halberstam was the second son of Chaim Halberstam or Divrei Chaim, the founder of the Sanz Hasidic dynasty of rebbes, which enjoyed enormous influence over the Hasidic Jewry in Western Galicia during the late 19th and early 20th centuries. Raised in a family of enormous prestige, from childhood and early youth he was exposed to Talmudist, poskim and Kabbalistic disputes of his time, and was trained to be a religious leader. Like his older brotherYechezkel Halberstam he did not succeed his father in Sanz; the rabbinical position went to his younger brotherAharon Halberstam instead. Married twice, Halberstam had at least three sons, Moses, Joshua and Naftoli, and a number of grandsons. Many of them became distinct figures within the Chrzanow Hasidic population. He is buried at the Chrzanow Jewish cemetery, his family ohel is well maintained.
Leadership
It is not clear if Halberstam had served as rebbe before moving to Chrzanow; also the exact date of him assuming the post is unknown. During his tenure, he became engaged in the growing rivalry between the Sanz and the Radomskerschools. Though the Radomsk leader, Tiferes Schlomo, was a disciple of his father and the two maintained fairly respectful relations, Dovid Halberstam aggravated them by his personal intransigence. Highly respected as a religious leader, Halberstam was appreciated for his scholarly competence and pious zeal. However, he turned out to be a divisive figure within the localJewish community. This was due to rigorous application of his teaching, his firm grip on the leadership and the uncompromising style. As a result, a number of civil libel charges were brought against him. Also, despite some attempts, his authority has never stretched beyond the Chrzanow area. Over time the influence of Halberstam grew so significant that he became the founder of the dynasty of Chrzanow rebbes, which guided the Jewish population of the town for almost a century. His son Naftoli and then his grandson Mendel succeeded him at the post and led the local religious community until its destruction in 1942-1943.