I worked for Sacramento City Unified School District and I would say - STAY AWAY from it if you can! Poor management (at a principal level), tolerance of fighting and wild misbehavior, yuck! Maybe it's better in the more affluent neighborhoods.
I have heard good things about Elk Grove schools...the bad thing is, is that the city is growing so fast, it can't keep up with building schools, and they are overcrowded. You might live across the street from a school, but your child might get bussed across town. I don't know, but likely the schools are on the year-round calendar if they are overcrowded.
When I was a teacher in LA, we were being trained by some Sac City USD teachers in the "Open Court" reading program. Knowing I wanted to move to the area, I asked them which were the best school districts to put my daughter in. They told me San Juan, Folsom-Cordova, or Buckeye Union. THEY told me NOT to put my daughter in Sac City Unified.
San Juan serves the unincorporated part of Sac County, I believe the middle east (geographically, not ethnically) part of town. They have been in the news lateley because they have been shutting schools down for lack of enrollment - not many new houses in this part of town, apparently older folks living there whose kids have grown up. Interestingly, it seems in Northern CA, differently than Southern CA, young families tend to go for the new homes. In So. Cal, neighborhoods were more mixed. Anyways, there may be bussing if the local school is shut down.
Folsom-Cordova serves the cities of Folsom and Rancho Cordova. Which both have a large population, I'm still surprised they haven't split up. Folsom is a newer, upscale, growing area, and well-planned because it is newer. Rancho Cordova has a lot of older areas, although they have some big housing tracts going in south of highway 50.
We chose Buckeye Union, which serves El Dorado Hills, Cameron Park, and Shingle Springs. It is about 30-40 miles out of downtown, up in the foothills. We have been extremely happy with our choice. Small schools, everyone knows my daughter - and she's a good kid, not a bad one- and the quality of life up here is great.
Good luck!