[7] In 1764, about 40 families of Acadians, still living in exile after the Grand Dérangement nine years earlier, settled in Sinnamary.

[10] After Napoleon reintroduced slavery in 1802,[11] the town started to grow, and the discovery of gold caused a second boom.

[5] The Guianan Soyuz launch site is situated within the territory of the Sinnamary commune.

The town is home to US Sinnamary who play at the Stade Omnisports [fr] which has a capacity of 2,500 people.

[17] Crique et Pripri Yiyi is a 284 square kilometres (110 sq mi) protected area and wetland located in the commune.