The North Dakota Pottery Collectors Society is an organization, which was created to enhance collecting interest in the types of pottery made in North Dakota.

Nancy Brock and Norma Jones co-founded the National Autumn Leaf Collectors Club (NALCC) in the fall of 1978.

HLCCA is dedicated to providing a serious educational forum and communication tool for all those who are interested in the important contribution that HLC has made to American culture, from 1873 to the present.

The purpose of the Pickard Collectors' Club is to research, educate, communicate and preserve the history and artifacts of the art movement represented by Pickard and other American porcelain studios and artists.

The only national non-profit organization dedicated solely to the identification and preservation of Watt Pottery.

The National Insulator Association, is an international organization of collectors and friends interested in communication and electrical insulators.

ACME was established in 1994 for the purpose of preserving the history and to encourage the collecting of domestic and international antique coffee mills.

We are the oldest "knife-only" organization, bringing together knife fanciers & enthusiasts, knife collectors, knifemakers and knife dealers from all over the world, with something for everyone who appreciates cutlery.

The American Lock Collectors Association was founded in 1970. Its purpose is to educate, socially unite and discover new lock collectors.

AAMUC was founded early in 1977 by a small group of collectors of American military uniforms who felt the need to work together to improve their personal collections and themselves by exchanging their ideas and knowledge.