Pennsylvania - Criteria: C (architecture/engineering)
| Gallatin School |
| Gamble Mill |
| Garden Court Historic District |
| Gardenville-North Branch Rural Historic District |
| Gardner-Bailey House |
| Garrett Farmstead |
| Gass House |
| Gates, Gen. Horatio, House, and Golden Plough Tavern |
| Gauff-Roth House |
| Gehman, John, Farm |
| Geiger Covered Bridge |
| Geiger Mill |
| Gemeinhaus-Lewis David De Schweinitz Residence |
| General Electric Switchgear Plant |
| General Stores and Mold Loft Building-Harriman Yard of the Merchant Shipbuilding Corporation |
| Gerloff Road Bridge Crossing Swamp Creek |
| German Evangelical Zion Lutheran Church |
| Germania Turnverein Building |
| Germantown Grammar School |
| Germantown Junction Station |
| Gettysburg Armory |
| Gettysburg Battlefield Historic District |
| Gettysburg National Military Park |
| Gibson House |
| Gibson's Covered Bridge |
| Gilbert Bridge |
| Gilbert, Thomas and Lydia, Farm |
| Gilfillan Farm |
| Gillespie, Elizabeth Duane, Junior High School |
| Gilpin Homestead |
| Girard Avenue Historic District |
| Girard Group |
| Given, James, Tavern |
| Givin, Amelia S., Free Library |
| Gladden, Joseph, House |
| Gladwyne Historic District |
| Glenays |
| Glencairn |
| Glendside Memorial Hall |
| Glen Foerd at Torresdale |
| Glen Hope Covered Bridge |
| Glen Rock Historic District |
| Glessner Bridge |
| Globe Knitting Mills |
| Globe Ticket Company Building |
| Gloninger Estate |
| Gloria Dei (Old Swedes') Church National Historic Site |
| Goldsboro Historic District |
| Good, John B., House |
| Goodman Brothers and Hinlein Company |
| Goodwin Acres |
| Gordon, George W., Farm |
| Gordon, Jervis, Grist Mill Historic District |
| Goshenville Historic District |
| Grace Church, Mt. Airy |
| Graeme Park |
| Graff's Market |
| Graham and Laird, Schober and Mitchell Factories |
| Grand Army of the Republic Building |
| Grand View Dairy Farm |
| Grange, The |
| Grant, O.B., House |
| Gratz, Simon, High School |
| Graver's Lane Station |
| Gray, John, House |
| Grays Road Recreation Center |
| Gray-Taylor House |
| Great Conewago Presbyterian Church |
| Great Valley Mill |
| Greenbelt Knoll Historic District |
| Greencastle Historic District |
| Greene Hills Farm |
| Greenfield Elementary School |
| Greensboro Historic District |
| Greensboro Public School |
| Greensburg Downtown Historic District |
| Greensburg Railroad Station |
| Green Tree Tavern |
| Greenville Commercial Historic District |
| Greenwood Farm |
| Greenwood Lake Dam |
| Greenwood School |
| Greersburg Academy |
| Gregg, Andrew, Homestead |
| Gregg, Joseph, House |
| Greisemer's Mill Bridge |
| Grey Towers |
| Griesemer-Brown Mill Complex |
| Griest, W.W., Building |
| Griffey, Benjamin, House |
| Griffith, William R., House |
| Grimshaw Silk Mill |
| Gristmiller's House |
| Gross Bridge |
| Grove Historic District |
| Grove Mansion |
| Grubb, Conrad, Homestead |
| Grubb Mansion |
| Grumblethorpe |
| Grumblethorpe Tenant House |
Data from United States Park Service and Wikidata
