Otto Tief, Estonian lawyer and politician, Prime Minister of Estonia (died 1976)

Otto Tief was an Estonian politician, military commander, and a lawyer.

This is a list of people, who have been heads of government of the Republic of Estonia from 1918, either as a Chairman of the Council of Elders (1918), Prime Minister, State Elder (1920–1934) or President-Regent (1937–1938). The office of prime minister (Peaminister) first came into use soon after Estonia gained its independence in 1918. From 1918 to 1934, Estonia used a parliamentary political system, where the presidency and ministry were subject to parliamentary confidence, but instead of a presidential office, the government was headed by a prime minister and from 1920 to 1934, a similar office called State Elder (Riigivanem).

August 14 is the 226th day of the year in the Gregorian calendar; 139 days remain until the end of the year.