Montsinéry-Tonnegrande is a commune of French Guiana, an overseas region and department of France located in South America. Montsinéry-Tonnegrande is to the south-west of Cayenne. It contains an Amazon zoo and various walking trails. The town was formerly host to an internment camp for Indochinese prisoners in the 1930s.
The commune was previously known as Tonnegrande-Montsinéry, but on 27 March 1969 the name was officially changed into Montsinéry-Tonnegrande. Montsinéry is home to a shortwave transmission facility operated by the TDF Group that is designed to target listeners in the Americas and West Africa. The site is capable of DRM digital shortwave transmissions. An image of the rotatable curtain array antenna in Montsinéry can be found by searching Flickr for "Montsinery antenne". One of their broadcasting frequencies is the 7335 kHz slot that CHU (Canada) recently abandoned.