Northwest Snohomish is located at (47.936926, -122.103607)
According to the United States Census Bureau, the CDP has a total area of 2.6 square miles (6.8 km²), of which, 2.5 square miles (6.6 km²) of it is land and 0.1 square miles (0.2 km²) of it (3.42%) is water.