Seegräben is a municipality in the district of Hinwil in the canton of Zürich in Switzerland. Besides the village of Seegräben itself, the municipality also includes the settlements of Aathal and Sack.
Seegräben has an area of 3.8 km2 (1.5 sq mi). Of this area, 49.9% is used for agricultural purposes, while 15.4% is forested. Of the rest of the land, 15.6% is settled (buildings or roads) and the remainder (19.1%) is non-productive (rivers, glaciers or mountains).In 1996 housing and buildings made up 10.4% of the total area, while transportation infrastructure made up the rest (5.3%). Of the total unproductive area, water (streams and lakes) made up 10.4% of the area. As of 2007 12.7% of the total municipal area was undergoing some type of construction.
The Robenhauser Ried wetland is a nature reserve of national importance and is situated between Seegräben, Kempten and Irgenhausen covering an area of about two square kilometers.
Seegräben is the smallest municipality in the district of Hinwil. It consists of three sections, the village of Seegräben, Aathal and Sack.