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The total population of Marathon County is estimated to be 137,820 with 69,713 males (50.58%) and 68,107 females (49.42%). There are 1,606 less females than males in Marathon County.
The median household income in Marathon County was $73,437 in 2021, which marked an an increase of 2,016(2.82%) from $71,421 in 2020. This income is 98.43% of the U.S. median household income of $74,606 (all incomes in 2022 inflation-adjusted dollars).
Per the latest American Community Survey by the Census Bureau, Marathon County sees its highest median household income among householders in the age group of 25 to 44 years old, at $85,026. Overall, the median household income for the county of Marathon County stands at $69,740.
In Marathon County, the median income for all workers aged 15 years and older, regardless of work hours, was $47,984 for males and $30,909 for females. However, when specifically considering full-time, year-round workers within the same age group, the median income was $61,606 for males and $44,634 for females.
In Marathon County, the demographic landscape is diverse, spanning 5 distinct racial categories among households. Among these, White households have the highest median household income at $72,534, while Two or More Races households represent the opposite end with the lowest median household income of $38,138.
In 2022, the population of Marathon County was 137,958, a 0.15% increase year-by-year from 2021. Previously, in 2021, Marathon County's population was 137,746, a decline of 0.22% compared to a population of 138,047 in 2020.
The median age in Marathon County, WI is 40.8, as per 2021 ACS 5-Year Estimates. Of the total population, 18.92% were under the age of 15, 17.55% aged 15 to 29, 45.91% aged 30 to 64, 15.22% aged 65 to 84, and 2.41% were 85 years of age and older.
Racial distribution of Marathon County population: 89.34% are White, 0.62% are Black or African American, 0.17% are American Indian and Alaska Native, 5.52% are Asian, 0.07% are Native Hawaiian and other Pacific Islander, 0.89% are some other race and 3.41% are multiracial.