- Established: 1869, by Central Pacific Railroad
- Miles from San Francisco: 751.6
- Railroad Function: Two separate railroad sidings existed at Kosmo: West Kosmo, used by the railroad 1912- 1942?; built in conjunction with potash activity, and East Kosmo, used by the railroad October 1901- April 4, 1906; housed 3 bunkhouses, a cookhouse, garage, stock corral, general store, blacksmith shop, coal house and a car body that served as its depot; utilized by several area ranchers; the two sidings were located one-half mile apart
- Historical Overview: Potash, a necessary ingredient in producing gun powder, had previous to World War I been primarily produced by Germany; with the advent of World War I, a new source had to be identified; when potash was discovered near Kosmo, The Salt Lake Potash Company built canals, ponds, a rail siding and processing station at West Kosmo (often referred to as Kosmo after East Kosmo siding was abandoned) to produce the product, crucial to the war effort
- Location: Located between Monument and Lake on the Central Pacific route, south of the Great Salt Lake; East Kosmo was 3.5 miles west of West Lake; West Kosmo was another half mile west
- No Population estimates for this isolated northern Utah ghost town; at least 200 people lived there in 1924
