Oldsmar is a city of 13,591, as of the 2010 census, in Pinellas County, Florida, United States.
There were only a handful of settlers in the area in 1916 when Ransom Eli Olds decided to purchase 37,541 acres (151.92 km2) on the northern tip of Tampa Bay from Richard Peters in what is the present-day Oldsmar. At the age of 52, the inventor of the Oldsmobile and REO cars embarked on a grand undertaking, turning the untamed land in northern Tampa Bay into a bustling community. He paid $400,000 for the land: $200,000 in cash, $75,000 in bonds and a $125,000 apartment house in Daytona Beach. The town was originally named R. E. Olds-on-the-Bay. The name was later changed to Oldsmar. In 1927 the name was changed again to Tampa Shores, and finally in 1937 it was changed back to Oldsmar.