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 2026 population of 16,783. Lynden is currently growing at a rate of 1.9% annually and its population has increased by 6.18% since the most recent census, which recorded a population of 15,806 in 2020.