of 2000, there were 44,722 people, 16,944 households, and 12,148 families residing in the city.
The population density was 1,491.1/km² (3,862.0/mi²). There were 17,552 housing units at an average density of 585.2/km² (1,515.7/mi²).
Unincorporated county lands border San Ramon to the east and west.
It is located around 500 feet (150 m) above sea level.
The homeowner vacancy rate was 1.3%; the rental vacancy rate was 4.0%.
54,705 people (75.8% of the population) lived in owner-occupied housing units and 17,368 people (24.1%) lived in rental housing units.
Its weather is similar to the adjacent cities of Danville, Dublin and Pleasanton.