According to the 2018 American Community Survey, Green Park had a median household income of $60,563, and a median family income of $79,261. The unemployment rate was 4.4%. The per capita income was $29,379. About 5.5% of the population lived below the poverty line, including 9.5% of those under the age of 18 and 7.3% of those 65 years of age or older.<ref>https://data.census.gov/cedsci/table?g=0400000US29_1600000US2929324&d=ACS%205-Year%20Estimates%20Data%20Profiles&tid=ACSDP5Y2018.DP03</ref> | According to the 2018 American Community Survey, Green Park had a median household income of $60,563, and a median family income of $79,261. The unemployment rate was 4.4%. The per capita income was $29,379. About 5.5% of the population lived below the poverty line, including 9.5% of those under the age of 18 and 7.3% of those 65 years of age or older.<ref>https://data.census.gov/cedsci/table?g=0400000US29_1600000US2929324&d=ACS%205-Year%20Estimates%20Data%20Profiles&tid=ACSDP5Y2018.DP03</ref> |