Jews probably settled Śniadowo in the second half of the 16th century. Initially, they came under the Tykocin Community Council. But, by the late 17th century, they had become an independent community already in the late 17th century. In 1777, it was the first Jewish Community Council in the Łomża region and Łomża Jews also belonged to it.
The wooden synagogue was probably constructed in the 1760's. Śniadowo Jews mainly earned their living from crafts and small trade. In the late 19th century, when the town developed, it had nineteen shops and financial institutions, most of which were owned by Jews.
During World War I, the Russian army expelled Jews from Śniadowo and burned down the synagogue. Only a few returned after the war. In 1921, only 386 Jews lived in the town, down from 1,300 at the end of the 19th century. Most of the former residents had settled in Łomża or had emigrated abroad. Although it is known that the Zionist Organisation and other Jewish parties operated in Śniadowo, no details are available.
In the 1930's, the situation of Śniadowo Jews was difficult due to boycotts of Jewish shops and anti-Jewish demonstrations. There were cases of hooligan groups smashing Jewish stalls in the market. There were also incidents of unrest. The riots of 1st November 1936 and 7th March 1938 were particularly painful for the Jewish community.
In 1941, the Germans killed more than 50 Jews. The rest were sent to the Łomża ghetto. On 2nd November 1941, they were transported to the Zambrów camp together with other inmates and, in January 1943, to German Nazi death camp Auschwitz-Birkenau.