In 1854 Old Courthouse Square was donated to the County of Sonoma by J. Carrillo, B. Hoen, J.W. Hartman and T.G. Hahman. That same year after a vigorous selection campaign, the county seat was moved from Sonoma to Santa Rosa. For the next 30 years the seat of the county government was located adjacent to this Square. In 1884 the first Courthouse on this site was dedicated by General Vallejo. The earthquake of 1906 destroyed that building and much of Santa Rosa. The cornerstone for the last courthouse on this square was laid in 1908. Sonoma County gradually outgrew this structure and in 1966 it was demolished. Its granite steps have been used in the construction of this Square.
This area served as the center for the Administration of Justice in Sonoma County for 82 years. To commemorate its long use as the legal center for the County, it has been officially named 'Old Courthouse Square'.
The above dedication is taken from the plaque donated by the Lawyers Wives of Sonoma County in 1967

From 1967-2016, Old Courthouse Square was divided by a road connecting Santa Rosa Avenue and Mendocino Avenue.
In 2017, Old Courthouse Square was reunified and reconstructed to create a civic gathering place in the heart of downtown Santa Rosa. The granite steps were once again saved and used to form the frame around the lawn which is representative of the footprint of the original Courthouse on the Square.

Old Courthouse Square Reunification Press Coverage


A Square is Born
North Bay Bohemian, Published June 7, 2017

Celebrating Old Courthouse Square Reunification
The Press Democrat, Published April 29, 2017

Old Courthouse Square Officially Re-Unified
KSRO Radio, Aired April 29, 2017

Reunified at last, Santa Rosa celebrates its new Old Courthouse Square
The Press Democrat, Published April 29, 2017

Interview: Mayor Coursey on Courthouse Square Reunification Ceremony
KSRO Radio, Aired April, 28, 2017

Santa Rosa celebrates reunified Old Courthouse Square with festival
The Press Democrat, Published April 27, 2017

Santa Rosa’s Reunified Old Courthouse Square Opens Saturday
KRCB North Bay Public Media, Published April 26, 2017

Santa Rosa downtown businesses' hope renewed by reunified Old Courthouse Square
The Press Democrat, Published April 24, 2017

Santa Rosa’s Old Courthouse Square, then and now
The Press Democrat, Published April 22, 2017

Old Courthouse Square project takes shape in Santa Rosa
The Press Democrat, Published February 27, 2017

Courthouse Square Reunification Update
Santa Rosa MetroChamber, Published September 14, 2016

Santa Rosa’s Old Courthouse Square reunification delayed
North Bay Business Journal, Published September 12, 2016

Santa Rosa starts Old Courthouse Square reunification work this week
The Press Democrat, Published May 22, 2016

Courthouse Square Reunified – More than the Sum of Two Halves
Pen-For-Rent, Published April 10, 2016

Reunification of Santa Rosa’s Courthouse Square
Sonoma County Gazette, Published April 6, 2016

Courthouse Square reunification replaces trees
SantaRosan, Published March 31, 2016

Santa Rosa approves final unified Courthouse Square design
North Bay Business Journal, Published January 28, 2016

Old Courthouse Square – Finally Reunification?
KSRO Radio, Aired November 14, 2015

Gaye LaBaron: Old Courthouse Square has divided Santa Rosa for 160 years
The Press Democrat, Published July 18, 2015 

Courthouse Square reunification decision Tuesday
The Press Democrat, Published July 13, 2014

Santa Rosa to delay Courthouse Square project
The Press Democrat, Published February 15, 2014

Courthouse Square Tree Removal Questioned
KRCB North Bay Public Media, Aired February 2014