Manteca is 76 miles due east of San Francisco, in the San Joaquin Valley. The Sierra Nevada Mountains is approximately a 2 hour commute. It is about midway between Stockton and Modesto on State Highway 99. The 120 Bypass connects Interstate 5 and Highway 99. The city limits cover approximately 14.9 square miles of level terrain, and the population within the city limits is projected to be 72,836 as of 2009.
Manteca is surrounded by rich agricultural lands. Although industries based on agriculture are still very important to the City's economy, electronic firms are now among the principal employers in Manteca. These firms are generally located in the City's developed industrial park, in the southeastern quadrant of Manteca.