| Name | Street | Number | Occupation |
|---|---|---|---|
| Jaccard, J. A. | Chacabuco | 74 | watchmaker |
| Jaccard, Luis U. | Alsina | 63 | consul |
| Jackson, T. | Reconquista | 99 | broker |
| Jacob, Luis | Perú | 3 | watchmaker |
| Jacobsen, L. | Florida | 242 | bookseller |
| Jacobsen, Peter | Corrientes | 69 | hardware |
| Jacquet, | Bolívar | 3 | vice-consul |
| Jacquelin, Charles, | Corrientes | 339 | medical doctor |
| Jallaguier, And. | Lavalle | 334 | medical doctor |
| Jambrich, Juan | Rivadavia | 769 | hatter |
| James, Elias | Corrientes | 572 | dentist |
| Jammes, J. L. | Salta | 108 | academy |
| Janasens, J. | San Martín | 178 | agent |
| Jaquet, A. | Bolívar | 3 | jeweller |
| Jardin, Benigno | Tacuarí | 93 | lawyer |
| Jardín del Plata | Tucumán | 720 | |
| Jáureguy, | Belgrano | 233 | importer |
| Jennerich, Albert | Santa Fe | 756 | baker |
| Jockey Club | Florida | 102 | |
| Johnston & Co. | Reconquista | 81 | ship-brokers |
| Jones, Frank | San Martín | 24 | River Plate Telephone Co. |
| Jolly, H. | Reconquista | 212 | ship-broker |
| Joly, C. M. | Victoria | 135 | bookseller |
| Jones, Thomas H. | Reconquista | 71 | manager, English Bank of the River Plate |
| Jones, L. L. | Florida | 67 | druggist |
| Jordan, Swinfen, | Cangallo | 55 | broker |
| Jordan & Smith, | San Martín | 90 | brokers |
| Jorge, Faustino | Moreno | 115 | lawyer |
| Jorge, José M. | Libertad | 529 | medical doctor |
| Jost & Co. | Piedad | 214 | tanners |
| Josué, Carlos | Victoria | 79 | dry goods |
| Junor, Messrs. W. D. & A. W. | Artes | 170 | academy |
| Jubin, J. | Centro América | 186 | miller |
| Jürgensen, Pedro | Suipacha | 138 | upholsterer |
M. G. & E. T. Mulhall, Handbook of the River Plate (London: Trübner & Co., 1885) pages 668.
Guía Mensual de Kidd, Imprenta de J. H. Kidd, setiembre de 1884, pages 60, 150, 155.