St. John is a town located in Whitman County, Washington. St. John has a 2025 population of 588. St. John is currently declining at a rate of -0.34% annually and its population has decreased by -1.51% since the most recent census, which recorded a population of 597 in 2020.
The average household income in St. John is $67,693 with a poverty rate of 14.31%. The median age in St. John is 55.1 years: 49 years for males, and 55.3 years for females.
Data after 2023 is projected based on recent change
The racial composition of St. John includes 87.74% White, 7.45% Black or African American, and smaller percentages for Native American, Asian and multiracial populations.
White (87.7%)
Black or African American (7.4%)
Two or more races (3.9%)
Native American (0.4%)
Asian (0.4%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 601 | 87.74% |
| Black or African American | 51 | 7.45% |
| Two or more races | 27 | 3.94% |
| Native American | 3 | 0.44% |
| Asian | 3 | 0.44% |
Married
Widowed
Divorced
Separated
Never Married
St. John's average per capita income is $39,375. Household income levels show a median of $61,000. The poverty rate stands at 14.31%.
Name | Median | Mean |
|---|---|---|
| Married Families | $93,125 | - |
| Families | $85,938 | $93,173 |
| Households | $61,000 | $67,693 |
| Non Families | $24,792 | $34,810 |
Average Income
Median Household Income
Poverty Rate