[7] Prior to the arrival of the Spanish, the area around Rosemead was populated by Native Americans known as the people of the willow houses or better known as the Kizh (pronounced Keech), alternatively Tongva or as the Spaniards renamed them, the Gabrieleños.

In 1771, the Spanish founded the first Mission San Gabriel Arcángel in the area that was formally known as the village of Shevaangna or Siba what is [first Angeleno William McCawley 1996] now known as La Misión Vieja or Whittier Narrows on the border between Montebello and Rosemead.

In 1775, the mission moved to avoid the spring floods that ruined the first crops, to its present location in San Gabriel formally known as the village of Tovisvanga .

[8] During the Spanish Colonial era, the area that is now the City of Rosemead was part of the land administered by the San Gabriel Mission.

As part of the Mexican government's Secularization Act of 1833, the land, formerly held by the Mission, was distributed to private citizens, requiring only that they build a house and graze cattle, bringing to an end the Mission Era [9] Following the Mexican–American War and the 1848 signing of the Treaty of Guadalupe which transferred sovereignty over the territory now known as the State of California to the United States, Anglo-American immigration began to flow to the area.

[11] In 1852, John and Harriet Guess moved cross-country in an ox drawn wagon, to the San Gabriel Valley from Conway County, Arkansas.

[12] In 1855, the couple camped where present-day Savannah Elementary School is located on Rio Hondo Avenue.

Rose and his wife Amanda bought about 600 acres (2.4 km2) of land between what is now Rosemead Boulevard and Walnut Grove Avenue.

The airport at this location in Rosemead was apparently built at some point between 1940 and 1942, as it was not depicted on a 1940 LA street map.

At some point between 1942 and 1944 the airport was renamed Rosemead, as that is how it was labeled on the 1944 LA Sectional Aeronautical Chart (courtesy of John Voss).

[13] Fletcher Aviation acquired the airport from the Heasley brothers during the Korean War and later sold to AJ Industries in the 1960s, AJ immediately sold the portion of the land from Rio Hondo Avenue almost to Rosemead Boulevard to AeroJet Corporation and they built a large facility there.

According to the 2010 United States Census, Rosemead had a median household income of $45,760, with 18.8% of the population living below the federal poverty line.

[37] These were the ten neighborhoods in Los Angeles County with the largest percentage of Asian residents, according to the 2000 census:[38] Fire protection in Rosemead is provided by the Los Angeles County Fire Department[39] with ambulance transport by American Medical Response.

[40] The Los Angeles County Sheriff's Department provides law enforcement, operating out of the Temple City Station.

The Rosemead School of Psychology, which is now located with Biola University in La Mirada, was named after its original location in Rosemead and was the first independent professional school of psychology in the nation to be accredited by regional accrediting association.

[44] The Chinese cuisine fast food chain Panda Restaurant Group is headquartered in Rosemead.

City Council 2023:[48] Administration: Before December 2012, Rosemead was located in California's 32nd congressional district, which had a Cook Partisan Voting Index of D +17.

[52] Currently, Rosemead is in California's 28th congressional district, represented by Democrat Judy Chu.

[55] According to the United States Census Bureau, the city has a total area of 5.2 square miles (13 km2).

Currently closed to undergoing refurbishing, it will again conduct monthly tours and host a variety of special events when completed.

"Rod Marinelli Stadium" appears in lights above the scoreboard and an encrypted bronze marker is placed at the southern edge of the field on a large stone.

The community of Rosemead, then called Savannah, [citation needed] is located adjacent to El Monte and is situated above the water table.

The slightly elevated land made it the logical alternative as the burial site for residents of swampy Lexington.

When the City of Rosemead started to widen Valley Boulevard in the 1920s, construction crews unearthed dozens of corpses outside the fence of the cemetery.

[66] A small portion of the Montebello Town Center is actually located within Rosemead city limits.

The boundary line between Montebello and Rosemead runs through the eastern end of the shopping mall.