Both countries are a part of Organization of American States, CARICOM and Commonwealth of Nations.

Both nations share close ties due to being former colonies of the British Empire with similar demographics and being in the Caribbean.

In 2017, Prime Minister Timothy Harris offered aid and financial support to Trinidad and Tobago during a severe rainy season.

[1] St Kitts and Nevis sent a delegation to attend a retreat on Trinidad regarding "building Caribbean resilience" in 2017.

Among things discussed were dealing with natural disasters and creating a sustainable food supply chain.