The following names only represent a small portion of the City of Portland.
| Name | 1889 Directory | 1890 Directory | 1891 Directory | |
| 1 | E.M. Lang & Co. | 61 Kennebec St. | 61 Kennebec St. | 61 Kennebec St. |
| 2 | Andrew Lang | 3 Danforth St. | 3 Danforth St. | 3 Danforth St. |
| 3 | Caleb N. Lang | 237 High Street | 237 High Street | 237 High Street |
| 4 | Mrs. Caroline H. Lang | 46 Brown Street | 46 Brown Street | 46 Brown Street |
| 5 | Miss Clara Lang | not listed | not listed | 237 High Street |
| 6 | Edward B. Lang | not listed | not listed | 526 Congress Ave. |
| 7 | Edward M. Lang | Falmouth Rd | Falmouth Rd | Falmouth Rd |
| 8 | Edward M. Lang Jr. | 31 Forest Ave. | 31 Forest Ave. | 31 Forest Ave. |
| 9 | Frank J. Lang | 250 High Street | 60 Mellen St. | 60 Mellen St. |
| 10 | Frederick D. Lang | 143 Oxford St. | 308 Portland St. | not listed |
| 11 | Gertrude E. Lang | 237 High Street | not listed | not listed |
| 12 | Henry Lang | 38 India Street | 15 Commercial St. | 15 Commercial St. |
| 13 | Izatus V. Lang | 31 Forest Ave | 31 Forest Ave | 31 Forest Ave |
| 14 |
Jane Lang - Widow* |
30 Pleasant St. | 116 Monument Ave. | 116 Monument Ave. |
| 15 | Joseph B. Lang | 9 Laurel St | 46 Green Street | 46 Green Street |
| 16 | Joseph B. Lang Jr. | 7 Adams Place | 7 Adams Place | 7 Adams Place |
| 17 | Mamie Lang | not listed | not listed | 116 Monument Ave. |
| 18 | Miss Mary Lang | not listed | 251 High Street | 251 High Street |
| 19 | Sewall Lang | 69 Thomas Rd | 69 Thomas Rd | 69 Thomas Rd |
| 20 | Summer C. Lang | 44 Winter St. | 44 Spring St. | 44 Spring St. |
| 21 | Thomas Lang | no address | not listed | not listed |
Notes
* Widow of James Lang
Cullinan
| Name | 1889 Directory | 1890 Directory | 1891 Directory | |
| 1 | Michael J. Cullinan | 17 Summer Street | 17 Summer Street | 17 Summer Street |
| 2 | Michael H. Cullinan | not listed | 1 Spring Place | 1 Spring Place |
| 3 | John Cullinan | not listed | 1 Spring Place | not listed |
