
Tompkins County
- State:
- New York
Tompkins County's estimated 2025 population is 102,076 with a growth rate of -0.72% in the past year according to the most recent United States census data. Tompkins County is the 28th largest county in New York. The 2010 population was 101,743 and has seen a growth of 0.33% since that time.