Afro-American Historical Society of DE
512 East 4th Street
Wilmington, DE 19801
(302) 571-9300

Bethel Historical Society
P.O. Box 55
Bethel, DE 19931
(302) 875-5425

Bridgeville Historical Society
P.O. Box 306
Bridgeville, DE 19933
(302) 337-7823 or 327-7125

Delaware Civil War Society
P.O. Box 3205
Wilmington, Delaware 19804-0205

Delaware Genealogical Society
505 North Market Street
Wilmington, DE 19801-3091
(302) 656-0637

Delaware Historical Society
505 North Market Street
Wilmington, DE 19801-3091
(302) 655-7161

Delaware Mennonite Historical Society
12447 Beach Highway
Greenwood, DE 19950

Downstate Delaware Genealogical Society
P.O. Box 1787
Dover, DE 19903

Fort Delaware Society
P.O. Box 553
Delaware City, DE 19706
(302) 834-1630

Frederick Historical Society
c/o R.D. 2, Box 161AA
Lewes, DE 19958
(302) 945-0680

Georgetown Historical Society
510 South Bedford Street
Georgetown, DE 19947

Greater Harrington Historical Society
P.O. Box 64, 108 Fleming Street
Harrington, DE 19952
(302) 398-3698

Jewish Historical Society of Delaware
505 North Market Street
Wilmington, DE 19801-3091

Laurel Historical Society
P.O. Box 102
502 E. 4th Street
Laurel, DE 19956
(302) 875-1344

Lewes Historical Society
110 Shipcarpenter Street
Lewes, DE 19958

Lower DelMarVa Genealogical Society
P.O. Box 3602
Salisbury, MD 21802-3602

Milford Historical Society
P.O. Box 352
Milford, DE 19963
(302) 422-3115

Milton Historical Society
P.O. Box 112
Milton, DE 19968
(302) 684-1010

Nanticoke Indian Association
R.D. 4, Box 107A
Millsboro, DE 19966
(302) 945-3400 or 947-9137

Newark Historical Society
Box 711
Newark, DE 19711
(302) 731-0955

New Castle Historical Society
32 East 3rd Street
New Castle, DE 19720-5006

Port Penn Area Historical Society
P.O. Box 120
Port Penn, DE 19731
(302) 834-2464 or 834-2421

Rehoboth Beach Historical Society
P.O. Box 42
Rehoboth Beach, DE 19971
(302) 227-6111 or 226-1119

Seaford Historical Society
Ross Plantation
Rt. 1, Box 393
Seaford, DE 19973
(302) 628-9500

Smyrna Heritage Association
11 South Main Street
Smyrna, DE 19977-1430

Sussex County Genealogical Society
c/o Rehoboth Beach Public Library
226 Rehoboth Avenue
Rehoboth Beach, DE 19971

Winterthur Heritage Association
Route 52
Winterthur, DE 19735