- Gruzen, B. Sumner1
- Gurnsey Bro's & Co.1
- Guzman Gutierrez, M.N.14
- H and C Building Corp.1
- H and W Building Corp.1
- H. A. Menker & Co.1
- H. Behlen & Bro.1
- H. Clayton Smith and Co.11
- H. E. Bucklen & Co.1
- H. E. Hessler Company4
- H. Fountain1
- H. G. O. Cary1
- H. J. Heinz Co.1
- H. Mankel, Jr.1
- H. Midwood & Sons1
- H. Plagemann & Co.1
- H. T. Cushman M'f'g Co.1
- H. W. Carter1
- H. Wallach's Sons1
- H.J. Kalikow and Co., Inc.38
- H.R. Shapiro, Inc.5
- H.S. Hillyer and Co., Inc.1
- HRH Construction Co., Inc.1
- HY and D Agar, Inc.1
- Hackett, Carhart & Co.1
- Haffner Brothers Co.1
- Hageman, A.A.2
- Hageman, John2
- Hagerstown Table Works1
- Hall of Fame Building Corp.1
- Hall's Safe & Lock Co.1
- Halleran Agency1
- Halm, Bellows & Butler1
- Halpern and Pintel3
- Halpern-Stillman1
- Halsey Fitch & Son1
- Hames, C. Eugene1
- Hamilton Manor, Inc.1
- Hamilton, Iselin and Co., Inc.1
- Hampshire County National Bank1
- Hampton Management Co.23
- Hanfield, Hillyer, and Bell, Inc.10
- Hannis Distilling Company1
- Hard Brothers & Co.2
- Harick Building Corp.1
- Harkness & Co.1
- Harmon, Harry J.4
- Harper & Brothers, Publishers1
- Harper & Cosgrave Co.1
- Harper Management6
- Harris Brothers Company1
- Harris, Newmark and Co.5
- Harrisburg Boot and Shoe Mfg. Col., Limited1
- Harrisburg National Bank1
- Harrison Crescent Associates1
- Harrison and Abramovitz2
- Harrison and Fouilhoux6
- Harry Hoens, Inc.1
- Harry Klein Realty Co.4
- Hart, Merriam & Co.1