
Mchenry County
- State:
- North Dakota
McHenry County's estimated 2025 population is 5,003 with a growth rate of -1.26% in the past year according to the most recent United States census data. McHenry County is the 23rd largest county in North Dakota. The 2010 population was 5,402 and has seen a growth of -7.39% since that time.