national flag consisting of triangles of green, red, and blue and a yellow emblem off-centre toward the hoist. The flag's width-to-length ratio is 1 to 2.

The first flag of Eritrea was officially adopted on September 15, 1952, the day British authorities relinquished control over the area and four days before the Ethiopian-Eritrean Federation became effective. Its light blue background was to honour the flag of the United Nations (United Nations, flag of the) (UN (United Nations)), which had assisted the country to self-government. In the centre was a wreath of two olive branches surrounding an upright branch, coloured green; these also suggested the UN flag. On December 23, 1958, the Eritrean flag was replaced by that of Ethiopia (Ethiopia, flag of), which annexed the nation in 1962. About the same time, a liberation struggle was begun; after 1975 it was led by the Eritrean People's Liberation Front (EPLF).

The EPLF party flag, adopted in January 1977, consisted of three triangles: red, green, and blue. The red colour suggested blood shed for national liberation. The green and blue represented agricultural wealth and maritime resources, respectively. The yellow star on the red triangle stood for national mineral resources. The new national flag was first officially hoisted at the proclamation of independence on May 24, 1993. It had the triangles of the EPLF flag, but the star was replaced by a yellow version of the three olive branches in the 1952–58 flag. As standardized in 1995, the number of leaves in the wreath (30) corresponds to the years of civil war that led to independence.