- Indrusiak, Leocadia F
- Indurkar, S S
- Industrial and Technological Museum (Melbourne, Vic.)
- Industrial League.
- Industrial Technology Development Institute (Philippines)
- Industrial Vegetation Management Association of Alberta.
- Industrial Waste Diversion Program (Ont.)
- Industrial Workers of the World.
- Industrie-Comptoir (Weimar, Thuringia, Germany)
- Industrie-Comptoir (Weimar, Thuringia, Germany),
- Industrious Hen Co.
- Inebnit, Thomas
- Ineich, Ivan
- Ineichen, H
- Inês Silveira, Linda
- Ineson, Frank A. (Frank Avery), 1902-
- Inestrosa, Nibaldo C
- Infanger, Rex C
- Infante Garcia-Pantaleón, F
- Infante, Francisco
- Infante, Octavio
- Infante-Mata, Dulce
- Infante-Rivero, Edwin E
- Infantini, Vanessa
- Infanzón, Rosa M
- Info-Tech.
- Infra Eco Network Europe.
- Ing, Robert Tso-Ho, 1944-
- Ingale, S T
- Ingalhallikar, S
- Ingalls, Charles E.
- Ingalls, Sarah P.
- Ingalls, Thomas Russell, active 1834-1835
- Ingalls, Victoria
- Ingalls, Walter Fitch, 1863-
- Ingavat, Rucha
- Ingawale, D M
- Ingbar, Eric.
- Ingberman, Bianca
- Ingell, Mary A.
- Ingels Brothers (Firm),
- Ingels, C. S.,
- Ingels, Irvin.
- Ingels, J. R.,
- Ingels, Johan
- Ingen, Botha van
- Ingenhousz, Jan, 1730-1799
- Ingenito, Leonardo F. S.
- Ingenloff, Kate
- Inger, Robert F.
- Ingersoll, Anne R.
- Ingersoll, Ernest, 1852-1946
- Ingersoll, Fern S.
- Ingerson, H. G. (Howard George), 1892-
- Ingham Riverview Greenhouses,
- Ingham, Charles H
- Ingham, J K
- Ingham, John H. (John Hall), 1860-
- Ingham, Mable B.,
- Ingham, Merton C., 1930-
- Ingham, Norman D. (Norman Day)
- Ingham, Russell E
- Ingianni, Elizabeth A
- Ingle, Arthur P.
- Ingle, D. J. (Dwight Joyce), 1907-1978
- Ingle, H.D.
- Ingle, Herbert.
- Ingle, Nina R.
- Ingle, R. W.
- Ingle, Robert M
- Ingle, Robert.
- Ingleby, Sandy
- Ingles, Jean M
- Ingleside Farm Nurseries,
- Ingleside Floral Company.
- Ingleside Heights Dahlia Garden.
- Ingleside Nurseries.
- Ingleton, Tim
- Inglin, Barbara
- Inglin, David C.
- Inglis, Charles M
- Inglis, Graeme
- Inglis, Julian.
- Inglis, Peter W.
- Inglis, Tiffany
- Inglis, W Grant
- Ingman, Gary L.
- Ingmanson, Dale E
- Ingold, Danny J
- Ingold, Paul
- Ingoldby, C M
- Ingoldsby, L. E.
- Ingole, Baban
- Ingole, Shubhangi
- Ingolf (Cruiser)
- Ingpen, Abel, 1854
- Ingraham, Bob
- Ingraham, D. P.
- Ingraham, R. H.,
- Ingraham, Rhoby,
- Ingraldi, Michael F
- Ingram, A
- Ingram, Abigail L
- Ingram, B. S.
- Ingram, Brett Andrew
- Ingram, C
- Ingram, C K
- Ingram, Capt Collingwood
- Ingram, Collingwood
- Ingram, Edward T.
- Ingram, George Lewis Yeatman.
- Ingram, Glen J (Glen Joseph)
- Ingram, J C
- Ingram, J. W. (Jesse Wilburn), 1900-
- Ingram, John
- Ingram, John
- Ingram, John H., 1842-1916
- Ingram, John W
- Ingram, Keith T., 1953-
- Ingram, Mark
- Ingram, R John
- Ingram, Rosalie.
- Ingram, T. A.
- Ingram, William J
- Ingram, William Marcus 1913-1967
- Ingremeau, Patrick
- Ingrisch, S
- Ingrisch, Sigfrid
- Ingrouille, Martin
- Ingvason, P. A.
- Inhamuns, Antonio José
- Inhelder, E
- Iniesta, Luiz Felipe
- Iñigo-Elias Eduardo
- Iñiguez Monroy, Carmen
- Iñiguez, Alena Mayo
- Inkhavilay, Khamla
- Inkpen, Wayne.
- Inland Seed Company.
- Inman, A. H.
- Inman, Douglas L. (Douglas Lamar), 1920-2016
- Inman, Henry, 1801-1846
- Inman, Henry, 1837-1899
- Inman, Mary K.
- Inman, Ondess L. (Ondess Lamar), 1890-1942
- Inman, Robert M
- Inman, Roger.
- Innabi, Julie
- Innes, Alastair J
- Innes, Clive.
- Innes, Cosmo, 1798-1874
- Innes, David J
- Innes, Duncan G. L.
- Innes, Henry.
- Innes, R. T. A. (Robert Thorburn Ayton), 1861-1933
- Innes, Reginald Rose,
- Innes, William T. (William Thornton), 1874-1969
- Innis, Donald Q. 1924-1988
- Innisfallen Greenhouses.
- Innocenti, Gianna
- Innocentini, Valdir
- Innocenzo, Muzzalupo
- Inns, R
- Innys, John,
- Innys, William, 1756
- Inocencio, Cristina
- Inocencio, Lais
- Inoda, Toshio
- Inohuye-Rivera, Roxana B
- Inoma, Akitoshi
- Inomata, Emiko Ikejiri
- Inostroza, Agar A
- Inostroza, Ingrid
- Inostroza, Patricia
- Inostroza, Pedro A
- Inoue, H
- Inoue, Jun
- Inoue, Keisuke
- Inoue, Kentaro
- Inoue, Koji
- Inoue, Luis Antonio Kioshi Aoki
- Inoue, Mario Takao
- Inoue, Sakae
- Inoue, Shojiro
- Inoue, Shota
- Inoue, Tamiji
- Inouye, Satoshi
- Inqram, Collinuwood
- Insacco, Gianni
- Insafe, EL ABDOUNI
- Insalaco, Enzo
- Insausti, Jesús A
- Insausti, Pedro
- Inscoe, May N., 1925-
- Insect Attractants, Behavior, and Basic Biology Research Laboratory (U.S.)
- Insect Identification and Beneficial Insect Introduction Institute (U.S.)
- Insects Affecting Man and Animals Research Laboratory (U.S.)
- Inserra, R N
- Insisiengmay, Oudomphone
- Inskeep, A. H. (Abraham Hulings), 1780-1857
- Inskeep, Margaret R.
- Inskipp, Carol, 1948-
- Inskipp, Tim
- Insko, W. M. Jr.
- Institució Catalana d'Història Natural (Barcelona, Spain)
- Institut agricole d'Oka.
- Institut biologii razvitiia (Akademiia nauk SSSR)
- Institut Botànic de Barcelona
- Institut botanico-géologique colonial de Marseille.
- Institut botanique Léo Errera.
- Institut canadien de Québec.
- Institut colonial de Marseille.
- Institut de botanique de Strasbourg.
- Institut de France.
- Institut d'Egypte (1798-1801)
- Institut des Provinces et des Congrès Scientifiques.
- Institut des recherches agronomiques. Association des anciens lves.
- Institut d'Estudis Catalans
- Institut d'Estudis Catalans. Institut de Ciencies. Barcelona.
- Institut d'Estudis Catalans. Secció de Ciències
- Institut égyptien.
- Institut eksperimentalnoi meditsiny (Soviet Union. Soviet narodnykh komissarov)
- Institut für Allgemeine Botanik Hamburg.
- Institut impérial de France
- Institut international de bibliographie scientifique.
- Institut istorii estestvoznaniia i tekhniki (Akademiia nauk SSSR)
- Institut morfologii zhivotnykh im. A.N. Severtsova.
- Institut national des sciences et des arts (France)
- Institut national genevois.
- Institut océanographique.
- Institut Pasteur (Paris, France)
- Institut Royal de France (Paris)
- Institut royal des sciences naturelles de Belgique.
- Institut Za Gorata (Bŭlgarska Akademii︠a︡ Na Naukite),
- Institute for Medical Research (Camden, N.J.)
- Institute for Medical Research (Malaysia)
- Institute For Missionaries On Agricultural And Rural Development.
- Institute for Oceanography.
- Institute for Telecommunication Sciences and Aeronomy (U.S.)
- Institute for Wildlife Studies.
- Institute of Andean Research (New York, N.Y.)
- Institute of Ecology.
- Institute of Ecosystem Studies (New York Botanical Garden)
- Institute of Jamaica, Kingston.
- Institute of Jamaica.
- Institute of Makers of Explosives.
- Institute of Malacology.
- Institute of Northern Forestry (U.S.)
- Institute of Oceanographic Sciences (Great Britain)
- Institute of Science (Philippines)