Omira is an unincorporated community in Lassen County, California. It is located on the Western Pacific Railroad 2.25 miles west-northwest of Constantia, at an elevation of 4347 feet.
A post office operated at Omira from 1910 to 1911 and from 1915 to 1918. The town was named by railroad officials for a woman who promised to build a church there if the town were named for her.
The Omira station closed in 1927.