Fort Gratiot Light
Lighthouse · St. Clair County, Michigan

Fort Gratiot Light is a lighthouse in St. Clair County, Michigan. Michigan has 124 lighthouses on record at Wayfarrow, 5 of them in St. Clair County.
It was built in 1829, in the first half of the 19th century, making it the oldest of the 89 in Michigan with a recorded construction date; its light sits 82 feet above the water; the light characteristic is recorded as Fl G 6s (a green flash every 6 seconds), with a range of about 18 nautical miles; it guards Lake Huron.
Status check, 2026-11: The original 1825 tower failed, and the current tower was built in 1829 and made taller in the early 1860s; sources give its present height as anywhere from 82 to 86 ft. Fort Gratiot Light is listed on the National Register of Historic Places. It stands at 43.0063° N, 82.4225° W.
Key facts
| Current structure built | 1829 |
|---|---|
| Focal height | 82 ft |
| Light characteristic | Fl G 6s |
| Range | 18 nautical miles |
| Body of water | Lake Huron |
| Heritage designation | National Register of Historic Places listed place |
| National Register | Listed |
| Coordinates | 43.00631, -82.42247 |
Nearby places
- Peche Island Rear Range Lightlighthouse · St. Clair County · 20.4 mi
- Merrillsvilleghost town · St. Clair County · 22.1 mi
- Pine Hillghost town · Sanilac County · 25.1 mi
- Port Sanilac Lightlighthouse · Sanilac County · 29.8 mi
- St. Clair Flats Rear Range Lightlighthouse · St. Clair County · 35 mi
- St. Clair Flats Range Front Lightlighthouse · St. Clair County · 35.2 mi
- St. Clair Flats Front and Rear Range Lightlighthouse · St. Clair County · 35.3 mi
- Lake St. Clair lightlighthouse · Macomb County · 41 mi
Questions
Where is Fort Gratiot Light?
Fort Gratiot Light is in St. Clair County, Michigan, at 43.0063, -82.4225.
How many lighthouses are in St. Clair County?
St. Clair County, Michigan has 5 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.