Thompson is located in Jo Daviess County, Illinois. Thompson has a 2025 population of 818 . Thompson is currently declining at a rate of -0.85% annually and its population has decreased by -2.73% since the most recent census, which recorded a population of 841 in 2020.
The average household income in Thompson is $116,404 with a poverty rate of 17.95%. The median age in Thompson is 59.6 years: 61.7 years for males, and 54.7 years for females. For every 100 females there are 84.0 males.
Data after 2023 is projected based on recent change
The racial composition of Thompson includes 94.87% White, and smaller percentages for and multiracial populations.
White (94.87%)
Two or more races (5.13%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 925 | 94.87% |
| Two or more races | 50 | 5.13% |
Married
Widowed
Divorced
Separated
Never Married
Thompson's average per capita income is $36,413. Household income levels show a median of $103,375. The poverty rate stands at 17.95%.
Name | Median | Mean |
|---|---|---|
| Married Families | $118,000 | - |
| Families | $113,611 | $130,178 |
| Households | $103,375 | $116,404 |
| Non Families | $60,375 | $79,890 |
Average Income
Median Household Income
Poverty Rate