Simi Valley is considered a conservative stronghold politically, along with the neighboring City of Thousand Oaks.
The electorate is often described as solidly Republican.
Numerous publications have described Simi Valley among the most conservative cities in the United States; Simi Valley was for instance ranked the 18th most Conservative city in the country in 2005 by GovPro.com.
In the 2004 presidential election George W. Bush (R) won nearly 61% of the vote, compared to 44% statewide, while John Kerry (D) won 38% of the vote.

In the 2008 presidential election, Barack Obama (D) won 47% of Simi Valley, while John McCain (R) won 52% of the vote.
In the 2012 presidential election, Barack Obama won 43% of the vote, while Mitt Romney (R) won 55% of the vote.
Donald Trump's four-point win in the 2016 presidential election could possibly suggest a decreasing advantage for the Republican Party in Simi Valley.
Republican Kieth Mashburn has been the incumbent mayor since 2018.

The former Republican president and California governor, Ronald Reagan, is buried at the Ronald Reagan Presidential Library on a hilltop by the Thousand Oaks-Simi Valley city limits.
The presidential library is frequently visited by conservative speakers and has been hosting numerous Republican primary debates, including the first debate in the 2008 presidential election, the 2012 presidential election, and the second primary debate for the 2016 presidential election.
 Simi Valley is located within the 25th congressional district, represented by Mike Garcia.
The Simi Valley as well as neighboring Chatsworth are among the most Republican communities in the Greater Los Angeles Area, and the 25th district is among the most conservative in the State of California.
In November 2018, Katie Hill unseated Republican Steve Knight and became the first Democratic woman to represent the district in the House of Representatives.
Simi Valley is considered a conservative stronghold politically, along with the neighboring City of Thousand Oaks. The electorate is often described as solidly Republican. Numerous publications have described Simi Valley among the most conservative cities in the United States; Simi Valley was for instance ranked the 18th most Conservative city in the country in 2005 by GovPro.com. In the 2004 presidential election George W. Bush (R) won nearly 61% of the vote, compared to 44% statewide, while John Kerry (D) won 38% of the vote. 
In the 2008 presidential election, Barack Obama (D) won 47% of Simi Valley, while John McCain (R) won 52% of the vote. In the 2012 presidential election, Barack Obama won 43% of the vote, while Mitt Romney (R) won 55% of the vote. Donald Trump's four-point win in the 2016 presidential election could possibly suggest a decreasing advantage for the Republican Party in Simi Valley. Republican Kieth Mashburn has been the incumbent mayor since 2018.
The former Republican president and California governor, Ronald Reagan, is buried at the Ronald Reagan Presidential Library on a hilltop by the Thousand Oaks-Simi Valley city limits. The presidential library is frequently visited by conservative speakers and has been hosting numerous Republican primary debates, including the first debate in the 2008 presidential election, the 2012 presidential election, and the second primary debate for the 2016 presidential election.  Simi Valley is located within the 25th congressional district, represented by Mike Garcia. The Simi Valley as well as neighboring Chatsworth are among the most Republican communities in the Greater Los Angeles Area, and the 25th district is among the most conservative in the State of California. In November 2018, Katie Hill unseated Republican Steve Knight and became the first Democratic woman to represent the district in the House of Representatives.
Simi Valley, California