| William B. Cronyn House | |
| Location: | 271 9th St., Brooklyn, New York |
| Coordinates: | 40.67°N -73.9872°W |
| Built: | 1856 |
| Architecture: | Second Empire |
| Added: | June 3, 1982 |
| Area: | less than one acre |
| Refnum: | 82005030 |
| Designated Other2 Name: | NYC Landmark |
| Designated Other2 Date: | July 11, 1978 |
| Designated Other2 Abbr: | NYCL |
| Designated Other2 Link: | New York City Landmarks Preservation Commission |
| Designated Other2 Number: | 0997 |
| Designated Other2 Color: |
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William B. Cronyn House, also known as the House at 271 Ninth Street, is a historic home in Park Slope, Brooklyn, New York City. It was built in 1856 and is a three-story Second Empire style dwelling with a slate covered mansard roof. The roof has ornamental iron cresting and a central half-story cupola with clerestory.[1] In 1888, Charles M. Higgins (1854-1929) acquired the building to use as the Higgins American India Ink factory, and in 1899, added an extension to the factory at 240 Eighth Street.It was listed on the National Register of Historic Places in 1982.