It is one of 12 settlements in the Cheyenne River District. Green Grass had a population of 58 according
to the 2000 census. Native Americans accounted for 96% of the population of the CDP or census designated
place of Green Grass, South Dakota. Mixed bloods accounted for 3% of the cdp's population, while Hispanics accounted
for 15% of the cdp's population. There is a total of 18 housing units in the cdp, which gives the cdp an
average household size of around 3.4 persons per housing unit. Economically, the citizens of the cdp are
doing very poorly. Around 77% of the cdp's citizens live below the poverty line. Green Grass covers an area of
8.2 sq. mi., which means it is spread out. Elevation is 1,860 feet above sea level. There is no zip code. Below
are several links to phtographs of the Anishinabe-Dakota cdp of Green Grass, Cheyenne River-Standing Rock Reservation.