All county offices will be closed on Friday, July 3rd, in observance of Independence Day.

County Government

Contact Us - Elected Officials & Department Heads

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Normal Business hours are from 8:00 am to 4:30 pm - Monday - Friday

McHenry County Government Center
2200 North Seminary Ave.
Woodstock IL 60098

(815) 334-4000

Webmaster: [email protected]

Adamson, Melissa H.

  • Departments:Health Department
  • Title:Public Health Administrator
  • Phone:(815) 334-4510
  • Fax:(815) 334-4635
  • Email:
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