Noach (/ˈnoʊ.ɑːk/, /ˈnoʊ.ɑːx/) is the second weekly Torah portion (פָּרָשָׁה‎, parashah) in the annual Jewish cycle of Torah reading. It constitutes Genesis 6:9–11:32. The parashah tells the stories of the Flood and Noah's Ark, of Noah's subsequent drunkenness and cursing of Canaan, and of the Tower of Babel.

The parashah has the most verses of any weekly Torah portion in the Book of Genesis (but not the most letters or words). It is made up of 6,907 Hebrew letters, 1,861 Hebrew words, 153 verses, and 230 lines in a Torah Scroll (סֵפֶר תּוֹרָה‎, Sefer Torah). (In the Book of Genesis, Parashat Miketz has the most letters, Parashat Vayeira has the most words, and Parashat Vayishlach has an equal number of verses as Parashat Noach.)

Jews read it on the second Sabbath after Simchat Torah, generally in October or early November.

In traditional Sabbath Torah reading, the parashah is divided into seven readings, or עליות‎, aliyot, and a shorter, concluding reading called the maftir (מפטיר‎). In the Masoretic Text of the Tanakh (Hebrew Bible), Parashat Noach has five "open portion" (פתוחה‎, petuchah) divisions (roughly equivalent to paragraphs, often abbreviated with the Hebrew letter פ‎ (peh)). Parashat Noach has several further subdivisions, called "closed portion" (סתומה‎, setumah) divisions (abbreviated with the Hebrew letter ס‎ (samekh)) within the open portion divisions. The first open portion is from the first reading through the fifth readings. The second and third open portion divisions divide the sixth reading. And the fourth and fifth open portion divisions divide the seventh reading. Closed portion divisions divide the first reading, set off the third and fourth readings, and further divide the sixth and seventh readings.

In the first reading, the Torah tells that Noah was a righteous man, blameless in his age, who walked with God. Noah had three sons: Shem, Ham, and Japheth. God saw that all flesh on earth had become corrupt and lawless. The first closed portion ends here.

In the continuation of the reading, God told Noah that God had decided to bring a flood to destroy all flesh. God directed Noah to make an ark of gopher wood and cover it with pitch inside and outside. The Ark was to be 300 cubits long, 50 cubits wide, and 30 cubits high. It was to have an opening for daylight near the top, an entrance on its side, and three decks. God told Noah that God would establish a covenant with Noah, and that he, his sons, his wife, his sons' wives, and two of each kind of beast—male and female—would survive in the Ark. Noah did everything that God commanded him to do. The first reading ends here with the end of chapter 6.

In the second reading, in chapter 7, seven days before the Flood, God told Noah to go into the Ark with his household, and to take seven pairs of every clean animal and every bird, and two pairs of every other animal, to keep their species alive. When Noah was 600 years old, the Flood came, and that same day, Noah, his family and the beasts went into the Ark, and God shut him in. The second reading ends here.

In the third reading, the rains fell 40 days and 40 nights, the waters swelled 15 cubits above the highest mountains, and all flesh with the merest breath of life died, except for Noah and those with him on the Ark. When the waters had swelled 150 days, God remembered Noah and the beasts, and God caused a wind to blow and the waters to recede steadily from the earth, and the Ark came to rest on the mountains of Ararat. At the end of 40 days, Noah opened the window and sent out a raven, and it went to and fro. Then he sent out a dove to see if the waters had decreased from the ground, but the dove could not find a resting place, and returned to the Ark. He waited another seven days, and again sent out the dove, and the dove came back toward evening with an olive leaf. He waited another seven days and sent out the dove, and it did not return. When Noah removed the covering of the Ark, he saw that the ground had dried. The third reading and a closed portion end here.