From the State Historical Society of Missouri’s Adoption Records web page:

ORPHAN TRAIN ADOPTIONS

During the years 1854-1929, the Children's Aid Society of New York sent approximately 100,000 children from the streets of New York to find new homes with families in the Midwest. Many of these children were adopted by their new families. Adults, who came as children on the "Orphan Trains," or who had parents or grandparents who did, and who are now seeking to locate lost families, might wish to contact one or more of the following:

The Nebraska State Historical Society maintains a collection of Orphan Train Registry information.

Southwest Missouri Adult Adoptee Association
Route 2, Oak Crest Estates
Rogersville, MO 65742
(This association is compiling information on the 6,000 children who came on Orphan Trains and were left with families in Missouri.)

Missouri Folklore Society
P. O. Box 1757
Columbia, MO 65205-1757
(This Society is collecting information on the Orphan Train in order to preserve the folklore and history relating to them.)

Orphan Train Heritage Society of America, Inc. (OTHSA)
614 E. Emma Avenue, #115, P. O. Box 6760
Springdale, AR 72762-6760
Phone (501) 751-7830; Fax (501) 756-0769 ; e-mail: othsa@msn.com.
(This Society publishes a newsletter, Crossroads, and book, Orphan Train Riders: Their Own Stories.)

Ms. Evelyn Sheets
511 East 9th Street
Trenton, MO 64683
(Ms. Sheets has spent over 40 years compiling lists of Orphan Train children. Hundreds of survivors have written to her seeking clues to lost relatives. Ms. Sheets maintains a card file which is housed in the Grundy County/Jewett Norris Library, 1331 Main Street, Trenton, Missouri, 64683, (816) 359-3577. She is the co-author with Evelyn Trickel and Michael Patrick of We are a Part of History: The Story of the Orphan Train, c1990, 152pp., illustrated, available from Lightning Tree Press, P. O. Box 1837, Santa Fe, New Mexico 87504-1837, $25.00.)

In addition, the Local History and Genealogy Department maintains an information file on the Orphan Trains, and patrons may wish to consult the book "Orphan Trains to Missouri" by Michael Patrick. The library also has a number of different fiction and non-fiction works about the Orphan Trains.