March 12, 1933
|Children||Chaim Yisrael, Nechama, Avraham, Aaron, Yehuda, Rivka|
|Denomination||Haredi Orthodox Judaism|
|Yeshiva||Kollel Ohel Torah, Lakewood Township, New Jersey|
|Residence||Lakewood NJ, USA|
Rabbi Abadi was born in Venezuela and moved together with his parents to Tiberias, Israel at age 2. As a child Rabbi Abadi attended school in Haifa. Rabbi Abadi's studies began in the Yishuv Hachdash in Tel-Aviv, Israel and continued in Yeshivat Chevron in Jerusalem. At 19 years old, Rabbi Abadi was sent by the Chazon Ish to study in Montreux, Switzerland. A year later the Chazon Ish sent Rabbi Abadi to study in Lakewood, NJ, under the famed Rabbi Aharon Kotler.
Rabbi Abadi is a posek, and his students are rabbis across the globe. After Rav Kotler's death, Rabbi Abadi emerged as the leading posek for the entire Lakewood community. Rabbi Abadi branched out on his own in 1980, opening a premiere halacha kollel in Lakewood. In 1993, Rabbi Abadi transferred his kollel to Har Nof, Jerusalem, where it continued to produce scholars who are trained to decide halachic questions touching on every aspect of Jewish law. Rabbi Abadi moved back to Lakewood in 2009.
Owing to his prominence as a posek, Rabbi Abadi is asked the most difficult questions, in which he issues a number of innovative and controversial decisions. For instance, his ruling that permits writing a sefer torah through a silk screen process. and a more recent ruling that wigs made with Indian hair may be used. Rav Abadi also composed a short version of Birkat Hamazon based on the Rambam and other Rishonim, if one is unable to say the full version that is customary, one may say this version, even initially as a first choice.
Ohr Yitzchak Vol 1 
Ohr Yitzchak Vol 2 
Booklet on Niddah Laws 
- Ohel Torah Retrieved 13 April 2014.
- "The Silk Screen Sefer Torah" (PDF). Retrieved 14 April 2014.
- "אור יצחק - עבאדי, יצחק (page 359 of 465)" [Or Yitzhak - Abadi, Isaac (page 359 of 465)] (PDF) (in Hebrew). Hebrew Books. Retrieved 30 August 2015.
- "Ha'Emet Vahashalom Ehavu".
- Weiss, Steven I. (28 May 2014). "Orthodox Wig Controversy Likely to Ebb, Rabbis Say". Retrieved 14 April 2014.
- http://www.hebrewbooks.org/1525/ Retrieved 9 August 2015.
- "HebrewBooks.org Sefer Detail: אור יצחק חב -- עבאדי, יצחק". hebrewbooks.org. Retrieved 2018-11-22.
- "Rabbi Abadi Nidah". Scribd. Retrieved 3 February 2016.
- Raphael Lasry. "Birkat Hamazon Hakatzar". Retrieved 9 August 2015.
- "Short birkat hamazon". Ohel Torah. Retrieved 2018-11-22.
- oheltorah.com A kashrut and halachah website by Rabbi Abadi's sons, including a Q&A forum answered "according to the opinions of their father, Rabbi Yitzchak Abadi."