Tiffin is a city located in Seneca County, Ohio. Tiffin has a 2025 population of 17,652 . It is also the county seat of Seneca County . Tiffin is currently declining at a rate of -0.43% annually and its population has decreased by -2.12% since the most recent census, which recorded a population of 18,034 in 2020.
The average household income in Tiffin is $71,248 with a poverty rate of 12.3%. The median age in Tiffin is 36.7 years: 34.6 years for males, and 38.7 years for females. For every 100 females there are 95.1 males.
Data after 2023 is projected based on recent change
The racial composition of Tiffin includes 89.82% White, 4% Black or African American, and smaller percentages for other race, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White (89.82%)
Black or African American (4%)
Two or more races (3.35%)
Other race (1.39%)
Asian (1.07%)
Native American (0.31%)
Native Hawaiian or Pacific Islander (0.07%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 16,000 | 89.82% |
| Black or African American | 713 | 4% |
| Two or more races | 596 | 3.35% |
| Other race | 247 | 1.39% |
| Asian | 191 | 1.07% |
| Native American | 55 | 0.31% |
| Native Hawaiian or Pacific Islander | 12 | 0.07% |
Married
Widowed
Divorced
Separated
Never Married
Tiffin's average per capita income is $42,383. Household income levels show a median of $55,700. The poverty rate stands at 12.3%.
Name | Median | Mean |
|---|---|---|
| Married Families | $86,629 | - |
| Families | $71,799 | $83,773 |
| Households | $55,700 | $71,248 |
| Non Families | $37,774 | $55,106 |
Average Income
Median Household Income
Poverty Rate