Oldsmar is a city in Pinellas County, Florida, United States. As of the 2020 census, the city had a population of 14,898. The Oldsmar name date…Oldsmar is a city in Pinellas County, Florida, United States. As of the 2020 census, the city had a population of 14,898. The Oldsmar name dates to April 12, 1916, when automobile pioneer Ransom E. Olds purchased 37,541 acres of land north of Tampa Bay to establish a planned community.
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