In January 1849, Michael C. Nye and William Foster, brothers-in-law of Covillaud's wife, Mary Murphy, a survivor of the Donner Party, bought the other half of the Cordua ranch.

In October of the same year, Covillaud sold most of the ranch to Jose Ramirez, John Sampson, and Theodore Sicard.

During the Gold Rush, the ranch became a stopping point for the riverboats from Sacramento and San Francisco that brought prospectors to the digging grounds.

Then, after just three days in the mining camp, he accepted the nomination to run for alcalde, a Mexican official, which combined the duties of a mayor and justice of the peace, in a new government that was being formed.

In addition to the brick merchant buildings, Marysville had developed mills, iron works, factories, machine shops, schools, churches and two daily newspapers.

Debris loosed by hydraulic mining above Marysville raised the riverbeds of both the Feather and the Yuba Rivers and rendered the city vulnerable to flooding during winter storms and spring run-offs.

The hydraulic mining debris choked the Feather River and soon the riverboats could not make the trip to Marysville.

While many Chinese were driven forcibly from their homes throughout California between 1870 and 1900, Marysville became a place of refuge for them and was one of the few Chinatowns in the state that did not experience violence.

[11] There was also an active Jewish merchant community in Marysville from the Gold Rush era through the early years of the twentieth century.

Isaac and Simon Glazier ran the Old Corner Cigar Store from 1851 to 1862, when they moved to San Francisco.

In 2010, the Marysville City Council made a decision to sell a portion of Washington Square Park for development of a commercial shopping center, part of an effort to increase tax revenue.

In years of significant snow runoff from the nearby Sierra Nevada range or heavy rain from winter storms, these two rivers pose a serious flooding risk to the city.

Marysville has a hot-summer Mediterranean climate (Köppen Csa), which has mild, wet winters and hot, dry summers.

The wet season starts from mid-October and ends in mid-April when the region sees frequent rain and is usually under the tule fog.

The delta breeze, which comes from the Bay Area on summer nights, helps cool temperatures and add humidity.

At times this delta breeze is strong enough to bring coastal fog inland to the Sacramento Valley.

As of 2020, the council consisted of Mayor Chris Branscum, Vice-Mayor Bruce Buttacavoli, Brad Hudson, Stuart Gilchrist, and Dominique Belza.

As of 2018[update] San Joaquins trains are being studied to be extended north of Sacramento with a Marysville stop.

[42] The Amtrak Thruway 3 provides thrice daily connections from 858 I Street to/from Sacramento and Stockton[43] Marysville has 15 parks and they are classified as either community, neighborhood and passive.

The city's Beckwourth Riverfront Park is a large complex located on Bizz Johnson Drive adjacent to the Feather River.

Beckwourth Riverfront Park also hosts the annual Marysville Stampede, a rodeo event featuring Cotton Rosser and his crew.

The lives of local residents are documented by photographs, clothing, and other furnishings in the changing exhibits, including many of the Chinese community who helped establish Marysville.

Marching bands, fire trucks, antique cars, floats, and dance groups walk the streets of historic downtown.

It was not until then that the Women's Improvement Club of Marysville commissioned John McLaren, famed designer of the Golden Gate Park in San Francisco, to turn the swamp into a "beautiful lake".

It was recently renovated, to the current mayor, Bill D. Harris, Sr. On October 20, 2002, a car was found at the bottom of the lake, in seven feet of water.

The Marysville Police Department believes that she accidentally drove her boyfriend's car into the lake on October 10, 1981.

Her children thought she was victim of foul play; however, the Marysville Police Department maintains that there is no evidence to support that a crime was committed.

The lake, named for Marysville citizen W. T. Ellis, Jr., offers a pleasant walk, picnic areas, and fishing.

The lawsuit finally closed 11 months later when the California Department of Forestry & Fire Protection released a report stating that mortar shells burst low into the crowd onto the other side of the lake from Gazebo Island.

The California Swan Festival, was held from 2013 to 2016, November 13–15, with the central events in Marysville's Caltrans Building.