Sinai Map
Sinai (pronounced "SY'-nee-eye") is a town in Brookings County, South Dakota, United States. The population was 120 at the 2010 census.
Sinai is located at 44°14?42?N 97°2?36?W / 44.245°N 97.04333°W / 44.245; -97.04333 (44.245039, -97.043380).
According to the United States Census Bureau, the town has a total area of 0.4 square miles (1.0 km²), all of it land.
Nearby cities include Hetland, Ramona, Brookings, Oldham, Bruce.