Saint-Brieuc
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Prefecture and commune | |
![]() Location of Saint-Brieuc | |
| Coordinates: 48°30′49″N 2°45′55″W / 48.5136°N 2.7653°W | |
| Country | France |
| Region | Brittany |
| Department | Côtes-d'Armor |
| Arrondissement | Saint-Brieuc |
| Canton | Saint-Brieuc-1 and 2 |
| Intercommunality | Saint-Brieuc Armor |
| Government | |
| • Mayor (2020–2026) | Valentin Giraudeau |
Area 1 | 21.88 km2 (8.45 sq mi) |
| Highest elevation | 134 m (440 ft) |
| Lowest elevation | 0 m (0 ft) |
| Population (2023) | 44,364 |
| • Density | 2,028/km2 (5,251/sq mi) |
| Demonym(s) | Briochin, Briochine |
| Time zone | UTC+01:00 (CET) |
| • Summer (DST) | UTC+02:00 (CEST) |
| INSEE/Postal code | 22278 /22000 |
| 1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries. | |
Saint-Brieuc (French: [sɛ̃ bʁijø] ⓘ; Breton: Sant-Brieg [sãnt ˈbriːɛk]; Gallo: Saint-Berieu) is a city in the Côtes-d'Armor department in Brittany in northwestern France.

Saint-Brieuc is named after a Welsh monk, Brioc, who Christianised the region in the 5th century and established an oratory there. Bro Sant-Brieg/Pays de Saint-Brieuc, one of the nine traditional bishoprics of Brittany, which were used as administrative areas before the French Revolution, was named after Saint-Brieuc. It also dates from the Middle Ages, when the Pays de Saint Brieuc, or Penteur, was established by Duke Arthur II of Brittany as one of his eight "battles" or administrative regions.
The Hôtel de Ville was completed in 1873.
The town is located by the English Channel, on the Bay of Saint-Brieuc. Two rivers flow through Saint-Brieuc: the Goued/Gouët and the Gouedig/Gouédic.
Other towns of notable size in the département of Côtes d'Armor are Gwengamp/Guingamp, Dinan, and Lannuon/Lannion all sous-préfectures.
In 2009, large amounts of sea lettuce, a type of alga, washed up on many beaches of Brittany, and when it rotted it emitted dangerous levels of hydrogen sulphide. A horse and some dogs died and a council worker driving a truckload of it fell unconscious at the wheel and died.
Langueux, La Méaugon, Plérin, Ploufragan, Trégueux and Trémuson.
Saint-Brieuc experiences an oceanic climate.
| Town | Sunshine (hours/yr) |
Rain (mm/yr) | Snow (days/yr) | Storm (days/yr) | Fog (days/yr) |
|---|---|---|---|---|---|
| National average | 1,973 | 770 | 14 | 22 | 40 |
| Saint-Brieuc | 1,565 | 774.7 | 7.4 | 8.4 | 44.8 |
| Paris | 1,661 | 637 | 12 | 18 | 10 |
| Nice | 2,724 | 767 | 1 | 29 | 1 |
| Strasbourg | 1,693 | 665 | 29 | 29 | 56 |
| Brest | 1,605 | 1,211 | 7 | 12 | 75 |
| Climate data for Saint-Brieuc (1991–2020 normals, extremes 1985–present) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 15.9 (60.6) |
21.8 (71.2) |
23.9 (75.0) |
26.6 (79.9) |
29.0 (84.2) |
34.9 (94.8) |
39.7 (103.5) |
38.1 (100.6) |
31.5 (88.7) |
29.5 (85.1) |
20.7 (69.3) |
16.8 (62.2) |
39.7 (103.5) |
| Mean daily maximum °C (°F) | 8.9 (48.0) |
9.4 (48.9) |
11.4 (52.5) |
13.6 (56.5) |
16.4 (61.5) |
19.3 (66.7) |
21.4 (70.5) |
21.6 (70.9) |
19.5 (67.1) |
15.8 (60.4) |
12.0 (53.6) |
9.5 (49.1) |
14.9 (58.8) |
| Daily mean °C (°F) | 6.3 (43.3) |
6.5 (43.7) |
8.0 (46.4) |
9.8 (49.6) |
12.5 (54.5) |
15.3 (59.5) |
17.2 (63.0) |
17.4 (63.3) |
15.5 (59.9) |
12.6 (54.7) |
9.2 (48.6) |
6.9 (44.4) |
11.4 (52.5) |
| Mean daily minimum °C (°F) | 3.8 (38.8) |
3.6 (38.5) |
4.7 (40.5) |
6.0 (42.8) |
8.6 (47.5) |
11.2 (52.2) |
13.0 (55.4) |
13.2 (55.8) |
11.5 (52.7) |
9.4 (48.9) |
6.5 (43.7) |
4.3 (39.7) |
8.0 (46.4) |
| Record low °C (°F) | −11.3 (11.7) |
−9.4 (15.1) |
−3.9 (25.0) |
−1.8 (28.8) |
1.1 (34.0) |
3.6 (38.5) |
7.1 (44.8) |
6.6 (43.9) |
4.5 (40.1) |
−3.9 (25.0) |
−4.8 (23.4) |
−7.2 (19.0) |
−11.3 (11.7) |
| Average precipitation mm (inches) | 74.2 (2.92) |
64.5 (2.54) |
53.3 (2.10) |
59.7 (2.35) |
56.2 (2.21) |
50.7 (2.00) |
41.9 (1.65) |
44.5 (1.75) |
52.4 (2.06) |
81.6 (3.21) |
87.7 (3.45) |
90.6 (3.57) |
757.3 (29.81) |
| Average precipitation days (≥ 1.0 mm) | 13.5 | 12.4 | 10.6 | 10.9 | 9.2 | 7.8 | 7.3 | 7.6 | 8.4 | 12.8 | 14.2 | 14.8 | 129.6 |
| Mean monthly sunshine hours | 65.2 | 82.9 | 121.6 | 163.2 | 188.1 | 196.2 | 198.1 | 181.8 | 164.0 | 109.6 | 79.3 | 65.9 | 1,615.9 |
| Source: Meteociel | |||||||||||||
Saint-Brieuc is one of the towns in Europe that host the IU Honors Program.
The Cemetery of Saint Michel contains graves of several notable Bretons, and sculptures by Paul le Goff and Jean Boucher. Outside the wall is Armel Beaufils's statue of Anatole Le Braz. Le Goff, who was killed with his two brothers in World War I, is also commemorated in a street and with his major sculptural work La forme se dégageant de la matière in the central gardens, which also includes a memorial to him by Jules-Charles Le Bozec and work by Francis Renaud.
The town of St. Brieux in Saskatchewan, Canada, is named after Saint-Brieuc of Brittany. It was founded by immigrants from this region in Brittany. It was settled in the early 1900s.
Inhabitants of Saint-Brieuc are called Briochins in French.
Historical population | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Source: EHESS and INSEE (1968-2023) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
In 2008, 3.98% of primary school children attended bilingual schools.

The Saint-Brieuc railway station, situated on the Paris–Brest railway, is connected by TGV Atlantique to Paris Montparnasse station, with a journey time of about 2 hours 15.
There are no scheduled air services from Saint-Brieuc – Armor Airport.
Saint-Brieuc has been the place of residence for many notable people.
Saint-Brieuc préfecture of the Côtes-d'Armor is twinned with: