Well, no Michigan county ranked that well on the list. Here's where local counties ranked in the top 500:
No. 92: Livingston County
No. 123: Leelanau County
No. 144: Grand Traverse County
No. 222: Oakland County
No. 235: Midland County
No. 257: Ottawa County
No. 299: Emmet County
No. 354: Clinton County
No. 391: Charlevoix County
No. 397: Washtenaw County
No. 426: Allegan County
No. 484: Marquette County
No. 495: Benzie County
The healthiest ranked counties were Douglas County (Colorado), Los Alamos County (New Mexico) and Falls Church (Virginia). Check the full list and breakdown here.