• county
  • FIPS 26151
  • Largest town: Sandusky

Sanilac County, Michigan

Sanilac County had 40,293 residents in the Census Vintage 2024 estimate, on 962.6 square miles of land. It ranks 41st of 83 in Michigan by population and 11th by land area.

Population
40,293
#41 of 83 in Michigan · #1,184 in US
Area
962.6 sq mi
#11 of 83 in Michigan · #729 in US
Density
42 / sq mi
#55 of 83 in Michigan · #1,633 in US
Median household income
$57,382
#59 of 83 in Michigan · #2,094 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Sanilac County within Michigan. Pin: Lansing.

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Tools and pages that start from Sanilac County

Sanilac County population, land area and income

Sanilac County had 40,293 residents in the Census Vintage 2024 estimate, on 962.6 square miles of land. It ranks 41st of 83 in Michigan by population and 11th by land area. That works out to 41.9 people per square mile, below the US average of 96.3, and below the national county median.

The median county-equivalent in Michigan has 38,041 residents, about the same as Sanilac County.

Its SAIPE 2023 median household income of $57,382 is below the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

40,293

3144th1st

1184th of 3,144 (US)

Land area

963 sq mi

3144th1st

729th of 3,144 (US)

Density

41.9 / sq mi

3144th1st

1633rd of 3,144 (US)

Median household income

$57,382

3143rd1st

2094th of 3,143 (US)

Rank within Michigan (83)

Population

40,293

83rd1st

41st of 83 (MI)

Land area

963 sq mi

83rd1st

11th of 83 (MI)

Density

41.9 / sq mi

83rd1st

55th of 83 (MI)

Median household income

$57,382

83rd1st

59th of 83 (MI)

How Sanilac County's population changed since 2020

Sanilac County lost 211 residents between the July 2020 and July 2024 estimates, a drop of 0.5%. That ranks 68th of 83 in Michigan for growth. The median Michigan county changed by +0.9%, and the state as a whole by +0.7%.

Since the April 2020 estimates base, Sanilac County recorded 1,665 births and 2,509 deaths, a natural change of -844. Net international migration added +149 and net domestic migration, people moving to or from other US counties, came to +382. The largest single component was natural change, which removed 844 people.

40.5k202040.5k202140.5k202240.4k202340.3k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
1,665
Deaths
2,509
Net international migration
+149
Net domestic migration
+382
Change, July 2023 to July 2024
-141

Where Sanilac County is

The Census internal point of Sanilac County is at 43.449200, -82.642800. It sits in UTM zone 17N. The map shades Michigan's 83 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Sanilac County outlined. Dots are towns of 1,000+ people with residents in it.

Calhoun County: -0.3%Benzie County: +2.9%Newaygo County: +2.8%Antrim County: +4.6%Montcalm County: +4.0%Kalamazoo County: +1.1%Isabella County: +0.9%Ingham County: +1.9%Jackson County: +0.0%Kent County: +2.2%Oceana County: +1.1%Roscommon County: +2.0%Clare County: +1.8%Gladwin County: +2.5%Branch County: +2.9%Iosco County: +0.7%Bay County: -1.1%Shiawassee County: -0.0%Ionia County: -1.0%Otsego County: +3.8%Alcona County: +4.3%Missaukee County: +1.1%Crawford County: +4.7%Lapeer County: +0.7%Arenac County: +0.5%Gogebic County: -0.9%Marquette County: +2.2%Alpena County: +0.1%Lenawee County: -1.6%Berrien County: -1.1%Leelanau County: +2.5%Clinton County: +1.1%Alger County: -1.6%Gratiot County: -0.8%St. Joseph County: +0.4%Van Buren County: +0.7%Dickinson County: +0.3%Charlevoix County: +0.3%Sanilac County: -0.5%Wexford County: +2.3%Houghton County: +2.1%Saginaw County: -1.1%Kalkaska County: +3.8%Ottawa County: +3.1%Presque Isle County: +1.8%Eaton County: +0.3%Barry County: +2.3%Lake County: +7.5%Cheboygan County: +1.5%Wayne County: -1.0%Macomb County: +0.7%Oscoda County: +4.4%Emmet County: -0.5%Ontonagon County: +0.4%Schoolcraft County: +1.5%Monroe County: +0.7%Tuscola County: -1.0%Luce County: -1.3%Menominee County: -1.7%Mason County: +0.2%Muskegon County: +1.5%Baraga County: +0.3%Genesee County: -0.9%Grand Traverse County: +1.3%Washtenaw County: +0.5%Huron County: -1.9%Cass County: -0.0%Delta County: -0.5%Montmorency County: +7.2%Oakland County: +1.9%Chippewa County: -1.5%Keweenaw County: +5.0%Hillsdale County: -0.3%Manistee County: +1.8%Allegan County: +1.5%Mecosta County: +3.8%Iron County: +0.8%Osceola County: +2.5%St. Clair County: -0.1%Livingston County: +1.5%Ogemaw County: +1.0%Midland County: +0.6%Mackinac County: +3.1%
Change 2020 to 2024
  1. < -0.5%
  2. < +0.5%
  3. < +1.5%
  4. < +2.5%
  5. ≥ +2.5%
no data

Orange pin: Sanilac County internal point. Dark pin: Lansing.

Internal point

Decimal
43.449200, -82.642800
DMS
43°26'57.12"N 82°38'34.08"W
UTM
17N 367076.6E 4812010.4N
Geohash
dptppmtmg
Plus code
86MVC9X4+MV

Towns in Sanilac County

4 incorporated places of 1,000+ people have residents in Sanilac County, 8,099 people together, or 20% of the county. Each figure counts only the part of the town inside Sanilac County; towns marked "part" extend into another county. The largest is Sandusky with 2,679.

  1. 01Sandusky2,679
  2. 02Croswell2,289
  3. 03Marlette1,843
  4. 04Brown City (part)1,288
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Sanilac County

The Census 2024 county adjacency file lists 4 neighbors for Sanilac County. The most populous is St. Clair County, MI, with 160,308 residents. Distances run between Census internal points in a straight line.

Distance to Lansing and the nearest big city

Lansing is 108.4 miles WSW of Sanilac County's internal point in a straight line. The nearest place of 100,000 or more is Sterling Heights, MI (population 134,342), 63.1 miles away. The nearest place of 10,000 or more is Port Huron, MI (population 28,342), 33.2 miles away.

Sanilac County FIPS code

The FIPS code of Sanilac County is 26151: state code 26 for Michigan plus county code 151. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $57,382.

Questions people ask

What is the population of Sanilac County, Michigan?

The Census Vintage 2024 estimate for July 1, 2024 is 40,293. That is down 211 people (0.5%) from the July 2020 estimate of 40,504.

What is the FIPS code of Sanilac County?

26151. The first two digits (26) are Michigan; the last three (151) identify the county.

What is the largest town in Sanilac County?

Sandusky, with 2,679 residents inside Sanilac County in 2024.

Which counties border Sanilac County?

4 county-equivalents border it in the Census 2024 adjacency file: St. Clair County, MI; Lapeer County, MI; Tuscola County, MI; Huron County, MI.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.