Oakley is a city located in the California region of the United States. During the most recent census, Oakley had a population of 35,432. Oakley is the 241st most poplulated city in the California region, the 1,202nd most populated city in the United States and the 8,996th most populated city in the world. Oakley is in the America/Los Angeles timezone which is 7 hours behind UTC. Oakley adjusts the hour with daylight savings time during the winter months.