The Greenwood, Minnesota census of 2000 showed that of the 285 households within the city, households made up individuals accounted for 18.9%. 6.0% of the households had family member who was aged 65 years or above.
Most households had a size of 2.56 while most families had a size of 2.96. The spread out of the population of the city was 25.9% for persons aged 18 years and below, 2.9% for those aged between18 and 24 years, 26.7% for those aged between 25 and 44 years, 34.8 for those aged between 45 and 64 years and 9.6 % for those aged 65 years and above.