- Gas fields--Pennsylvania--Maps1
- Geology--Alaska--Gullkana River Region--Maps1
- Geology--Alaska--Sustina River Region--Maps1
- Geysers--Wyoming--Maps1
- Glass manufacture--Germany--Maps1
- Gnomonic projection (Cartography)--Maps1
- Gold mines and mining--Colorado--Central City--Maps.1
- Grazing districts--West (U.S.)--Maps1
- Groundwater--Connecticut--Saybrook--Maps1
- Harbors--China--Maps1
- Harbors--Germany--Kiel--Maps1
- Harbors--Germany--Lübeck--Maps1
- Harbors--Germany--Travemünde (Lübeck)--Maps1
- Harbors--Massachusetts--Salem--Maps1
- Harbors--Massachusetts--Woods Hole--Maps1
- Harbors--Russia (Federation)--Baltiĭsk--Maps1
- Harbors--Russia (Federation)--Kaliningrad (Kaliningradskai︠a︡ oblastʹ)--Maps1
- Harbors--South Africa--Durban--Maps1
- Health resorts--Japan--Maps1
- Highway departments--Germany--Maps1
Libraries & Collections
- Arts Library
- Bass Library
- Beinecke Library
- Classics Library
- Divinity Library
- Film Study Center
- Fortunoff Archive
- Humanities Collections
- International Collections
- Law Library
- Lewis Walpole Library
- Library Collection Services
- Manuscripts & Archives
- Map Collection
- Marx Science & Social Science Library
- Medical Library
- Music Library
- Sterling Library
- Yale Center for British Art
