The Supreme Soviet of the Latvian SSR (Latvian: Latvijas PSR Augstākā Padome; Russian: Верховный Совет Латвийской ССР, Verkhovnyy Sovet Latvyyskoy SSR) was the supreme soviet (main legislative institution) of the Latvian SSR, one of the union republics of the Soviet Union.

The Supreme Soviet of the Latvian SSR was established in 1940 as the People's Saeima and finally disbanded in 1990[1] and was briefly succeeded by the Supreme Council of the Republic of Latvia.

According to the 1978 Constitution of the Latvian SSR, representatives could serve an unlimited amount of five-year terms.

The sessions of the Supreme Soviet lasted only several days twice a year and decisions were made unanimously and without much discussion.

The amount of deputies in the Supreme Soviet was increased from 310 to 325 in the 1978 Constitution of the Latvian SSR.