The People's Democratic Republic of Ethiopia was a socialist state that existed in Ethiopia and present-day Eritrea from 1987 to 1991.

The Constitution of the People's Democratic Republic of Ethiopia, also known as the 1987 Constitution of Ethiopia, was the third constitution of Ethiopia, and went into effect on 22 February 1987 after a referendum on 1 February of that year. Its adoption inaugurated the People's Democratic Republic of Ethiopia (PDRE).