[1] Fallon is located at 38°16′29″N 122°54′21″W / 38.27472°N 122.90583°W / 38.27472; -122.90583, 2 miles (3.2 km) north of Tomales, at an elevation of 75 feet (23 m).

[1] It lies just west of State Route 1 along the abandoned North Pacific Coast Railroad.The name Fallon honors Luke and James Fallon, early local settlers.

Starting in the 1870s, Fallon was a stop on the North Pacific Coast Railroad connecting Cazadero to the Sausalito ferry to San Francisco.

The Fallon family operated a dairy and creamery in the area, and shipped dairy products to San Francisco and beyond by rail.

[3] The town survived the 1906 San Francisco Earthquake with little damage,[4] but in 1912, the creamery, train station, and other businesses burned to the ground, and Fallon began to decline as the creamery relocated to the Tomales area.