Old Town Eureka (Eureka Old Town Historic District) | |
 Near 2nd & "F" Streets in Old Town | |
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| Location | Eureka, California – Roughly, 1st, 2nd, & 3rd Streets, between B and M Streets |
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| Coordinates | 40°48′13.34″N 124°9′59.04″W / 40.8037056°N 124.1664000°W |
| Built | 1850–1874, 1875–1899, 1900–1924, 1925–1949 |
| Architect | Multiple |
| Architectural style | Victorian, Greek Revival, Classical Revival (Neoclassical) |
| Website | https://visiteureka.com/activities/old-town-waterfront/ |
| NRHP reference No. | 91001523[1] |
| Added to NRHP | 1991 |
Old Town Eureka (formally the Eureka Old Town Historic District) in Eureka, California, is a historic district listed on the United States National Register of Historic Places. It is a 350-acre (1.4 km2) area containing 154 buildings mostly from the Victorian era. The core of the district runs the length of First, Second, and Third Streets, between "C" and "M" Streets, and includes many types of architecture including Eastlake, Queen Ann, Greek Revival, Classical Revival, and Second Empire styles from the 1850s to the 20th century. Though not officially within the district, the Carson Mansion commands the highest elevation at the eastern edge of the district.