Sanilac County, Michigan Age & Gender Statistics (2024)

Total Population

40,462

Median Age

45.5

Male Median

44.7

Female Median

46.3

Sanilac County, Michigan Population Growth

Population trends in
Figure 1: Annual population growth trend for (2010–2024).

Sanilac County, Michigan Demographic Trend

Since 2010, the population of has changed by -8.1%%.

-8.1%% Growth

Sanilac County, Michigan Age & Gender Pyramid

Population pyramid for

Figure 2: Population distribution by age and gender for 2024.


Sanilac County, Michigan Historical Population Data

YearMedian AgePopulation
202445.540,462
202345.340,574
202245.240,759
202145.340,829
202045.441,179
201945.241,295
201845.141,376
201744.841,535
201644.641,761
201544.242,014
201443.642,301
201343.242,637
201242.743,096
201142.043,554
201041.444,010

Sanilac County, Michigan Age Group Breakdown (2024)

Age CohortPercentage
Under 55.0%
5–1716.0%
18–247.3%
25–3410.3%
35–5422.6%
55–6415.6%
65+23.2%

Dependency Ratios for Sanilac County, Michigan

Total Dependency Ratio:
79.2
Youth Dependency:
37.5
Old-Age Dependency:
41.6

The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).



Age & Gender FAQs for Sanilac County, Michigan

The median age in Sanilac County, Michigan is 45.5 years.

According to latest Census data, the total population of Sanilac County, Michigan is 40,462.

In Sanilac County, Michigan, seniors (ages 65+) make up 23.2% of the population, while children under 18 represent 16.0%.

Based on historical data since 2010, the population in Sanilac County, Michigan is aging.
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