Rock Harbor Light
Lighthouse · Keweenaw County, Michigan

Rock Harbor Light is a lighthouse in Keweenaw County, Michigan. Michigan has 124 lighthouses on record at Wayfarrow, 12 of them in Keweenaw County.
It was built in 1855, in the Civil War era, making it the 4th oldest of the 89 in Michigan with a recorded construction date; the tower stands about 50 feet tall (34th tallest of 63 measured in Michigan); it guards Lake Superior; the structure is built of brick.
Status check, 2026-11: This is the first lighthouse built on Isle Royale and was only lit for a few years (1855–58 and 1874–79). The tower has leaned about 2 degrees since it was stabilized in the 1950s. Wikipedia says building finished in 1856, but the National Register and most other sources say 1855. Rock Harbor Light is listed on the National Register of Historic Places. It stands at 48.0892° N, 88.5792° W.
Key facts
| Current structure built | 1855 |
|---|---|
| Tower height | 50 ft |
| Body of water | Lake Superior |
| Material | brick |
| Heritage designation | National Register of Historic Places listed place |
| National Register | Listed |
| Coordinates | 48.08917, -88.57917 |
Nearby places
- Isle Royale Lightlighthouse · Keweenaw County · 13.4 mi
- Passage Island Lightlighthouse · Keweenaw County · 13.6 mi
- Rock of Ages Lightlighthouse · Keweenaw County · 37.3 mi
- Eagle Harbor Lightlighthouse · Keweenaw County · 47.7 mi
- Eagle River Lightlighthouse · Keweenaw County · 48.5 mi
- Sand Hills Lightlighthouse · Keweenaw County · 49.3 mi
Questions
Where is Rock Harbor Light?
Rock Harbor Light is in Keweenaw County, Michigan, at 48.0892, -88.5792.
How many lighthouses are in Keweenaw County?
Keweenaw County, Michigan has 12 lighthouses on record at Wayfarrow.
- Wayfarrow status check (web sources) — Checked for current status (facts)
- Wayfarrow status check (web sources) — Checked for current status (facts)
- Wayfarrow status check (web sources) — Checked for current status (facts)
- Wayfarrow status check (web sources) — Checked for current status (facts)
- Wikidata — Wikidata item (CC0)
- National Register of Historic Places — National Register of Historic Places record (public-domain)
- Wikidata — Wikipedia article (linked as a source; text not used) (CC0)
Facts marked "approximately" carry an uncertain date in the source. Text on this page is generated from the sources above; no encyclopedia prose is copied. Last updated 2026-11-05.