 As seen in 1947 | |
 | |
| Location | Tillamook Head, Clatsop County, US |
|---|---|
| Coordinates | 45°56′15″N 124°01′08″W / 45.9375°N 124.019°W |
| Tower | |
| Construction | concrete (foundation), basalt (tower), brick (tower), iron (tower)  |
| Height | 62 ft (19 m) |
| Shape | square (tower), round (lantern) |
| Heritage | National Register of Historic Places listed place |
| Light | |
| First lit | 21 January 1881 |
| Deactivated | 1957 |
| Focal height | 133 ft (41 m) |
| Lens | first order Fresnel lens |
| Range | 18 nmi (33 km; 21 mi) |
Tillamook Rock Lighthouse | |
| NRHP reference No. | 81000480 |
| Added to NRHP | December 9, 1981 |
Tillamook Rock Light (known locally as Terrible Tilly or just Tilly) is a deactivated lighthouse on the northern Oregon Coast of the United States. It is located approximately 1.2 miles (1.9 km) offshore from Tillamook Head, and 20 miles (32 km) south of the mouth of the Columbia River near Astoria, situated on less than an acre of basalt rock in the Pacific Ocean. The construction of the lighthouse was commissioned in 1878 by the United States Congress and took more than 500 days to complete. Shortly before the completion of the lighthouse in January 1881, the barque Lupatia was wrecked near the rock during foggy weather and sank, with the loss of all 16 crew members.
Tillamook Rock Light was officially lit on January 21, 1881. At the time, it was the most expensive lighthouse to be built on the West Coast. Due to the local erratic weather conditions, and the dangerous commute for both keepers and suppliers, the lighthouse earned the nicknamed "Terrible Tilly" (or "Tillie"). Over the years, storms and the sea have damaged the structure, shattered the lens, and eroded the rock. The light was decommissioned in 1957, and has since been sold several times to private buyers. Since the 1980s it functioned as a columbarium until 1999. Today the lighthouse remains privately owned. Tillamook Rock Light is listed in the National Register of Historic Places, and is part of the Oregon Islands National Wildlife Refuge. The lighthouse is visible from the coastal cities of Seaside and Cannon Beach, as well as from Ecola State Park.