Last official estimated population of Bay County was 107,695 (year 2014)[1]. This was 0.034% of total US population and 1.1% of total Michigan state population. Area of Bay County is 630.7 mi² (=1633.5 km²), in this year population density was 170.75 p/mi². If population growth rate would be same as in period 2010-2014 (-0.02%/yr), Bay County population in 2026 would be 107,467 [0].
Historical population of Bay County for period 1860-2014 [1] , [2] , [3]:
Estimated population for 2014[1]. Population density is in p./sq.mi [4]. Changes are for period 2010-2015. Value is %/year. Boundary lines are approx. 2012 [5]. Click on flag to hide it.
Population • Density • Changes • Legends • Position

[1860-1870] +17.52 %/yr
[1870-1880] +9.13 %/yr
[1880-1890] +4.01 %/yr
[1890-1900] +1.01 %/yr
[1900-1910] +0.9 %/yr
[1910-1920] +0.19 %/yr
[1920-1930] -0.01 %/yr
[1930-1940] +0.77 %/yr
[1940-1950] +1.67 %/yr
[1950-1960] +1.92 %/yr
[1960-1970] +0.92 %/yr
[1970-1980] +0.21 %/yr
[1980-1990] -0.7 %/yr
[1990-2000] -0.13 %/yr
[2000-2005] -0.2 %/yr
[2005-2010] -0.26 %/yr
[2010-2014] -0.02 %/yr
Looking for settlements in Bay County? Visit this page: Settlements in Bay County, MI
Population of Bay County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 2882 | 2611 | 5,493 |
| 5 to 9 | 3180 | 3003 | 6,183 |
| 10 to 14 | 3386 | 3155 | 6,541 |
| 15 to 19 | 3246 | 2972 | 6,218 |
| 20 to 24 | 3396 | 3255 | 6,651 |
| 25 to 29 | 3272 | 3086 | 6,358 |
| 30 to 34 | 3075 | 3072 | 6,147 |
| 35 to 39 | 3024 | 2927 | 5,951 |
| 40 to 44 | 3186 | 3128 | 6,314 |
| 45 to 49 | 3502 | 3382 | 6,884 |
| 50 to 54 | 3944 | 4122 | 8,066 |
| 55 to 59 | 4068 | 4331 | 8,399 |
| 60 to 64 | 3657 | 3883 | 7,540 |
| 65 to 69 | 2988 | 3210 | 6,198 |
| 70 to 74 | 2181 | 2470 | 4,651 |
| 75 to 79 | 1520 | 1855 | 3,375 |
| 80 to 84 | 917 | 1444 | 2,361 |
| 85+ | 883 | 1966 | 2,849 |
Bay County resident population estimates by Sex, Race, and Hispanic Origin[1b]. For full list of abbrevations see: population.us/about page.
| Race | Male | Female | Total |
| WAC | 50575 | 52297 | 102,872 |
| NH | 49610 | 51227 | 100,837 |
| WA | 49547 | 51172 | 100,719 |
| NHWAC | 48055 | 49835 | 97,890 |
| NHWA | 47160 | 48863 | 96,023 |
| H | 2697 | 2645 | 5,342 |
| HWAC | 2520 | 2462 | 4,982 |
| HWA | 2387 | 2309 | 4,696 |
| BAC | 1637 | 1431 | 3,068 |
| NHBAC | 1493 | 1262 | 2,755 |
| TOM | 1056 | 1174 | 2,230 |
| NHTOM | 919 | 1009 | 1,928 |
| BA | 1066 | 781 | 1,847 |
| NHBA | 990 | 696 | 1,686 |
| IAC | 695 | 758 | 1,453 |
| NHIAC | 547 | 602 | 1,149 |
| AAC | 443 | 557 | 1,000 |
| NHAAC | 420 | 534 | 954 |
| AA | 312 | 412 | 724 |
| NHAA | 297 | 405 | 702 |
| IA | 316 | 325 | 641 |
| NHIA | 235 | 247 | 482 |
| HBAC | 144 | 169 | 313 |
| HIAC | 148 | 156 | 304 |
| HTOM | 137 | 165 | 302 |
| HBA | 76 | 85 | 161 |
| HIA | 81 | 78 | 159 |
| NAC | 29 | 37 | 66 |
| NHNAC | 27 | 29 | 56 |
| HAAC | 23 | 23 | 46 |
| HAA | 15 | 7 | 22 |
| NA | 10 | 8 | 18 |
| NHNA | 9 | 7 | 16 |
| HNAC | 2 | 8 | 10 |
| HNA | 1 | 1 | 2 |
• Genesee County population
48.8 mi,
163°
• Saginaw County
25.9 mi,
188°
• Midland County
20.3 mi,
259°
• Isabella County
43.2 mi,
264°
• Tuscola County
30.8 mi,
118°
• Gratiot County
42.1 mi,
228°
• Clare County
47.3 mi,
295°
• Gladwin County
28.7 mi,
314°
• Ogemaw County
44.4 mi,
350°
• Arenac County
26.1 mi,
26°
[0] Calculated by population.us from last known population growth rate, not official data.
[1] County population - 2014, archived from the original, retrieved 02/23/2016
[1b] Annual County Resident Population Estimates by Age, Sex, Race, and Hispanic Origin, (used only data for 2014) archived from the original, retrieved 02/23/2016
[2] County population - 2000-2010, archived from the original, retrieved 02/23/2016
[3] Population of States and Counties of the United States: 1790 to 1992, PDF, 15 Mb, census.gov, retrieved 02/23/2016
[4] County area, latitude longitude data, retrieved 02/23/2016
[5] County boundaries, CSV files on boundaries.us, retrived 03/18/2016
*Midland, Saginaw Michigan Notes
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