City of Grass Valley, Oregon

Grass Valley is located at 45°21'37" North, 120°47'3" West (45.360278, -120.784444).

According to the United States Census Bureau, the city has a total area of 0.53 mi² (1.37 km²). 0.53 mi² (1.37 km²) of it is land and none of the area is covered by water.

Grass Valley is located in the Pacific Standard Time (PST) timezone, GMT-08:00. It observes Daylight Saving Time (DST).