Detroit turns 325 on July 24, and that number deserves a moment. On that date in 1701, Antoine de la Mothe Cadillac stepped off a canoe with about 100 settlers and soldiers and founded Fort Pontchartrain du Détroit on the river. That makes Detroit 75 years older than the United States and 136 years older than Michigan itself. For the milestone, here are the facts every Detroiter should have ready, plus where to celebrate the birthday downtown.
Some of these you know. A few will win you a bar bet. For more city history in the making, see our Community coverage.
At a Glance
| The birthday | Detroit was founded July 24, 1701; the city turns 325 in 2026 |
| The founder | Antoine de la Mothe Cadillac, with a convoy of roughly 100 |
| The name | French for strait: le détroit, the river between Lake Erie and Lake St. Clair |
| Older than | The United States by 75 years, New Orleans by 17, and Chicago by more than a century |
| The motto | We hope for better things; it will rise from the ashes, born from the 1805 fire |
| Celebrate | Bonne Fête Détroit 325, Founders’ Ceremony at Hart Plaza, July 24 at 4 p.m. |
The Founding: A French City Before America Existed
Detroit began as a French fort and fur-trading post, built where the river narrows. Cadillac named it Fort Pontchartrain du Détroit for his patron in the French court, and the settlement took its everyday name from the water: le détroit du lac Érié, the strait of Lake Erie. Within two days of landing, the settlers founded Ste. Anne parish, which still serves the city today as one of the oldest continuously operating Catholic parishes in the country.
The timeline is the fact that stuns people. When the Declaration of Independence was signed, Detroit had already stood for 75 years. The city is older than New Orleans, older than St. Louis, and more than a century older than Chicago.
The Fire That Gave Detroit Its Motto
On June 11, 1805, a fire tore through the wooden town and destroyed nearly every building. Out of it came two things Detroit still carries. First, the motto on the city flag: Speramus meliora; resurget cineribus, Latin for We hope for better things; it will rise from the ashes. Second, the street plan: Judge Augustus Woodward redrew downtown with grand avenues radiating from Campus Martius, a design inspired by Washington, D.C. That is why Woodward, Michigan, Gratiot, Grand River, and Jefferson all meet the way they do.
Facts Every Detroiter Should Have Ready
- Detroit was Michigan’s first capital. The state government sat here until 1847, when it moved to Lansing.
- The first mile of concrete highway in America was poured on Woodward Avenue in 1909, between Six and Seven Mile.
- The modern traffic light took shape here. Detroit police officer William Potts introduced the three-color, four-way signal at Woodward and Michigan in 1920.
- Vernors is one of America’s oldest soda brands, created by Detroit pharmacist James Vernor and dated by the company to 1866.
- Eastern Market has fed the city since 1891, making it one of the oldest continuously operating public markets in the country.
- There is a working salt mine more than 1,000 feet under the city, with roads running beneath southwest Detroit.
- Motown started in a house on West Grand Boulevard in 1959, and techno was born here two decades later.
- The 313 area code has covered Detroit since 1947, long enough to become shorthand for the city itself.
How to Celebrate the 325th
The city marks the milestone in person. Bonne Fête Détroit 325 opens with a Founders’ Ceremony at the Founders’ Plaque in Hart Plaza on Friday, July 24, at 4 p.m., per organizers. Meanwhile, Rendez-vous Détroit hosts a French-heritage weekend on July 24 and 25, including a tribute at the Cadillac Convoy Plaque, a dinner with historian Catherine Cangany on early French Detroit, and Saturday talks on the region’s Francophone roots. Fittingly, the Friday reception is at the Fort Pontchartrain hotel, named for the original fort.
No tickets to anything downtown? Walk Hart Plaza anyway. The founders’ marker sits steps from where the canoes landed 325 years ago.
Detroit Birthday FAQ
When was Detroit founded?
July 24, 1701, when Antoine de la Mothe Cadillac established Fort Pontchartrain du Détroit on the Detroit River.
How old is Detroit in 2026?
325 years old, which makes the city 75 years older than the United States and 136 years older than Michigan.
What does the name Detroit mean?
It comes from the French détroit, meaning strait, for the river connecting Lake Erie and Lake St. Clair.
What is Detroit’s motto?
Speramus meliora; resurget cineribus: We hope for better things; it will rise from the ashes, adopted after the fire of 1805.
Is there a 325th birthday celebration?
Yes. Bonne Fête Détroit 325 holds a Founders’ Ceremony at Hart Plaza on July 24 at 4 p.m., and Rendez-vous Détroit hosts heritage events July 24 and 25.
Published July 17, 2026. Historical details reflect the established city record; event details come from organizers and can change.