National Terrazzo & Mosaic Association, Inc. https://ntma.com/
Terrazzo Association of Northeastern States http://www.terrazzonortheast.com/
Terrazzo Promotion Committee of the Southeast https://terrazzoinfo.com/
Western States Terrazzo Association www.westernstatesterrazzo.com
North Central Terrazzo Association https://www.ncterrazzo.com/
Southwest Terrazzo Association https://www.southwestterrazzo.org/
International Masonry Institute https://imiweb.org/
Terrazzo Tile & Marble Association of Canada https://www.ttmac.com/en/