Dairy Flat is a campground situated along the Big River in the Upper Big River State Forest, Victoria, roughly two and a half hours northeast of Melbourne via Marysville or Warburton.

It is one of numerous bush campgrounds scattered through this forested valley, which is centred on the heritage-classified Big River.

The surrounding state forest offers many kilometres of forest roads and tracks, making the area popular with four-wheel drivers and bush campers.

Dairy Flat is noted as one of the nicer spots in the Upper Big River area, sitting among a wide selection of creekside campgrounds that includes Fishbone Flat, Miners Flat, Stockmans Reward, and others.