| W. P. Mills House | |
| Location: | 1 Maksoutoff Street, Sitka, Alaska |
| Coordinates: | 57.0483°N -135.3332°W |
| Architect: | Louis L. Mendal |
| Builder: | Tim Demedoff |
| Added: | December 16, 1977 |
| Area: | less than one acre |
| Refnum: | 77000226 |
| Designated Other1: | Alaska Heritage Resources Survey |
| Designated Other1 Name: | Alaska Heritage Resources Survey |
| Designated Other1 Date: | October 27, 1972 |
| Designated Other1 Color: |
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| Designated Other1 Abbr: | AHRS |
| Designated Other1 Number: | SIT-025 |
| Designated Other1 Num Position: | bottom |
The W.P. Mills House, also known as Cushing House, Longenbaugh House, Poulson House and Island House, is a historic house at 1 Maksoutoff Street in Sitka, Alaska. It occupies a prominent site in Sitka, located on a small island in the harbor at the end of a 400feet causeway. The house is located on the site where, during the Russian period in the early nineteenth century, a fish-packing operation was located. In 1915, W. P. Mills, son of one of the former American owners of the saltery after the Alaska Purchase, hired Seattle-based architect Louis L. Mendal to design a house to stand on the old saltery's foundation. The design, which used the foundation as well as the massive wooden door of the saltery, adapted the foundation to provide a sheltered and private courtyard space, and to take advantage of the expansive views available.[1]
The house was listed on the National Register of Historic Places in 1977.