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El Rancho High School welcomes it's first class (although there was no senior class) in the fall of '52.
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Pico and Rivera merged into one city. After a vote, most residents preferred to call the city Pico Rivera rather than Serra City.
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After the merge, Pico Rivera becomes the 61 city of Los Angeles County only 22 days after merging the cities of Pico and Rivera.
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In the 1960s, the first Rivera School House becomes a new landmark and is showcased in Knott's Berry Farm in Buena Park, CA.
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in the 1960's, a monument across Smith Park is placed to honor all the veterans of the past and the present.
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A modern day building of 12,000 square foot building at Passons boulevard served and still serves as the Pico Rivera City Hall. it costed $400,000 to construct the building.
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The Pico Rivera Sports Arena was opened and was used as a multi-purpose facility. Although it served many purposes, it was used best for charreadas, or Mexican rodeos.
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The Pico Rivera History and Heritage Society establishes the Museum of Pico Rivera in what used to be a train depot.
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In 2002, an industrial park was established along with a Towne Center in front of it. Now, it contains many businesses and provide many jobs and resources to the residents of Pico Rivera.
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Pico Rivera celebrates its 50th anniversary as a city on January 29th, 2008.
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Mazatlan, Sinaloa, Mexico becomes the second sister city with Pico Rivera.
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Pico Rivera was recognized as the most business friendly city in the Los Angeles County
