- 1 Nidelet, S. F.
- 18 Night
- 9 Night photographs
- 1 Nightingale, Florence, 1820-1910
- 1 Nightingale, J. H. (Joseph Henry)
- 3 Niles Bement Pond Co.
- 1 Nine Power Pact
- 1 Nineteenth Street
- 39 Nineteenth Street
- 41 Nineteenth Street
- 62 Ninth Street
- 1 Ninth Street
- 1 Nisbett, Louisa, 1812?-1858
- 1 Nitrate
- 1 Nixon's Mill
- 41 Nizami Ganjavi, 1140 or 1141-1202 or 1203
- 1 No Thoroughfare
- 3 Noah (Biblical figure) - Ark
- 1 Noar and Steppacker Neckwear Makers
- 10 Nobility
- 1 Nobility of Lorraine, The (series)
- 3 Noble Street
- 7 Noblemen
- 1 Noblewomen
- 1 Noggs, Newman (Fictitious character)
- 1 Nolan Publishing Company (Firm)
- 2 Nomination
- 4 Nonnenarbeiten (Nun's work)
- 1 Nonotuck Silk Co. (Firm)
- 2 Nonotuck Silk Company
- 3 Nonpareil marbled paper
- 1 Nonsense
- 2 Nooses
- 1 Nordhoff, Charles, 1887-1947
- 2 Norfolk, Virginia
- 2 Normalcy
- 1 Norman Revival
- 2 Norman, John, 1748?-1817
- 1 Norris Square
- 5 Norris Street
