Sonoma Plaza in Sonoma County, California — The American West (Pacific Coastal)
Sonoma Plaza
Photographed by Joseph Alvarado, June 17, 2023
1. Sonoma Plaza Marker
Sonoma Plaza has been designated a Registered National Historic Landmark under the provisions of the Historic Sites Act of August 21, 1935. This site possesses exceptional value in commemorating and illustrating the history of the United States.
U.S. Department of the Interior - National Park Service - 1961
Gen. Mariano Guadalupe Vallejo 1807 1890
Erected 1961.
Topics and series. This historical marker is listed in this topic list: Notable Places. In addition, it is included in the National Historic Landmarks series list.
Location. 38° 17.565′ N, 122° 27.465′ W. Marker is in Sonoma, California, in Sonoma County. It is in Sonoma Plaza. It can be reached from East Napa Street (State Highway 12) west of First Street East, on the right when traveling west. The plaques are mounted on the right, inside the doorway to city hall. Touch for map. Marker is at or near this postal address: 1 The Plaza, Sonoma CA 95476, United States of America. Touch for directions.
Regionally, this marker is in California’s San Francisco Bay Area, in Wine Country, in the North Coast, and specifically on the Coast Ranges. It is also on the American Pacific Coast. Globally, it is in North America, on the Ring of Fire, in the Pacific Rim, in the Western Hemisphere, in the Western World, and in the Anglosphere. Historically, it finds itself in what was once New Spain and also Mexicos Alta California.
Other nearby markers. At least 8 other markers are within walking distance of this marker: General Mariano Guadalupe Vallejo (about 300 feet away, measured in a direct line); Raising of the Bear Flag (about 300 feet away); The Poppe-Parmelee Building (about 400 feet away); The Sonoma Cheese Factory
this page online
Regarding Sonoma Plaza. National Register of Historic Places Inventory Nomination Form:
The Sonoma Plaza
The eight acre plaza was laid out in 1835 by General Vallejo. In 1850, the City of Sonoma incorporated.
In the earlier period of Sonoma, the plaza had a number of holes where the adobe soil had been obtained to build the buildings around the plaza. The plaza has had several different fences around it with stiles for access. On October 13, 1851, General Vallejo presented a petition to the City Council urging the leveling of the plaza. In 1853, a tax passed to improve the plaza with $1,500. Appropriated for improvements.
Sonoma City Hall: Number 1, the Plaza
The corner stone for the building, located in the center of the plaza, was laid on February 22, 1906. On December 9, 1908, the building was dedicated and is still in use.
The building is of Early
Photographed by Joseph Alvarado, June 17, 2023
2. Sonoma Plaza Marker
Also see . . .
1. National Register of Historic Places Inventory Nomination Form:
. (Submitted on August 27, 2023, by Joseph Alvarado of Livermore, California.)
2. History of the Sonoma Plaza. Sonoma Valley California
"Sonomas town square is an enormous shaded plaza rimmed with old adobe buildings and carefully preserved historic structures. A stroll around the historic Plaza provides a fascinating look into early American life, including the former Mexican army barracks, the pristine San Francisco Solano Mission, the site of the Bear Flag Revolt, and the homes of General Vallejo. "(Submitted on August 27, 2023, by Joseph Alvarado of Livermore, California.)
Photographed by Joseph Alvarado, June 17, 2023
3. Sonoma City Hall
Credits. This page was last revised on July 17, 2025. It was originally submitted on August 27, 2023, by Joseph Alvarado of Livermore, California. This page has been viewed 321 times since then and 23 times this year. Photos: 1, 2, 3. submitted on August 27, 2023, by Joseph Alvarado of Livermore, California.
