Duluth South Breakwater Inner Light
Lighthouse · St. Louis County, Minnesota

Duluth South Breakwater Inner Light is a lighthouse in St. Louis County, Minnesota. Minnesota has 9 lighthouses on record at Wayfarrow, 4 of them in St. Louis County.
It was built in 1901, in the early 20th century, making it the 3rd oldest of the 8 in Minnesota with a recorded construction date; its light sits 69 feet above the water; the light characteristic is recorded as Fl W 5s (a white flash every 5 seconds), with a range of about 15 nautical miles; it guards Lake Superior.
Status check, 2026-11: The record's 1889 date belongs to the first tower; the current steel skeleton tower was built 1900–01 and first lit September 1, 1901, and sources give its height as 61, 67 or about 70 ft, so height is left null. Duluth South Breakwater Inner Light is listed on the National Register of Historic Places. It stands at 46.7787° N, 92.0920° W.
Key facts
| Current structure built | 1901 |
|---|---|
| Focal height | 69 ft |
| Light characteristic | Fl W 5s |
| Range | 15 nautical miles |
| Body of water | Lake Superior |
| Heritage designation | National Register of Historic Places listed place |
| National Register | Listed |
| Coordinates | 46.77872, -92.09203 |
Nearby places
- Duluth Harbor North Pier Lightlighthouse · St. Louis County · 0.2 mi
- Duluth South Breakwater Outer Lightlighthouse · St. Louis County · 0.2 mi
- Minnesota Point Lightlighthouse · St. Louis County · 5.7 mi
- Wisconsin Point Lightlighthouse · Douglas County · 6.2 mi
- Amnicon Falls Bridgecovered bridge · Douglas County · 15 mi
- Two Harbors Breakwater Lightlighthouse · Lake County · 25.6 mi
- Two Harbors Lighthouselighthouse · Lake County · 26 mi
- Harlisghost town · Pine County · 27.4 mi
- Beldenghost town · Pine County · 33.3 mi
- Londonghost town · Lake County · 38.3 mi
- Fermoyghost town · St. Louis County · 38.4 mi
- Splitrockghost town · Lake County · 42.7 mi
Questions
Where is Duluth South Breakwater Inner Light?
Duluth South Breakwater Inner Light is in St. Louis County, Minnesota, at 46.7787, -92.0920.
How many lighthouses are in St. Louis County?
St. Louis County, Minnesota has 4 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.