SSSR may refer to:
Smallest Set of Smallest Rings, a cheminformatics term for the minimal cycle basis of a molecular graph Society for the Scientific Study of Reading, a learned society promoting the study of reading and literacy Society for the Scientific Study of Religion, a learned society for a social scientific perspective on religious institutions and experiences SSS-R, a model of the Nissan Bluebird compact car
See also
CCCP (disambiguation) USSR (disambiguation)