Nilwood Township (T11N R6W) is a township located in Macoupin County, Illinois, United States. Its township hall is located at McVey. In addition to McVey, its boundaries incorporate the towns of Nilwood and Standard City. As of the 2010 census, its population was 637 and it contained 293 housing units.
According to the 2010 census, the township has a total area of , all land.
James Bullough Lansing, founder of audio companies Altec Lansing and JBL, is from Nilwood Township.