
West Seneca
- County:
- Erie County
- County Seat:
- No
- Area (mi²):
- 21.387
- State:
- New York
West Seneca is a CDP located in Erie County, New York. West Seneca has a 2025 population of 45,556. West Seneca is currently growing at a rate of 0.12% annually and its population has increased by 0.63% since the most recent census, which recorded a population of 45,272 in 2020.
The average household income in West Seneca is $93,749 with a poverty rate of 8.32%. The median age in West Seneca is 44.3 years: 44.2 years for males, and 44.4 years for females.