
Lynden
- County:
- Whatcom County
- County Seat:
- No
- Area (mi²):
- 5.435
- State:
- Washington
Lynden is a city located in Whatcom County, Washington. Lynden has a 2025 population of 17,043. Lynden is currently growing at a rate of 1.46% annually and its population has increased by 7.78% since the most recent census, which recorded a population of 15,813 in 2020.
The average household income in Lynden is $118,043 with a poverty rate of 8.72%. The median age in Lynden is 35.9 years: 37.1 years for males, and 35.6 years for females.