Ceres - SOI Adopted January 24, 2001

Hughson - SOI Adopted September 23, 2009

Modesto - SOI Adopted December 1, 2010

Newman - SOI Adopted January 28, 2009

Oakdale - SOI Adopted August 23, 2006

Patterson - SOI Adopted March 24, 2010

Riverbank - SOI Adopted May 28, 1997

Turlock - SOI Adopted September 26, 2007

Waterford - SOI Adopted August 22, 2007

Special Districts Sphere of Influence Maps - New!
Special districts are local agencies that provide public services such as fire protection, sewers, water, and storm drainage.  California has over 3,300 special districts.  Stanislaus County has 74 of these districts, each with its own LAFCO-adopted Sphere of Influence.
Click here to view a list of Special Districts and maps of each.
(Note:  This list only includes those special districts which Stanislaus LAFCO is the principal LAFCO.  Although other districts may overlap into Stanislaus County, the principal county is that which holds the majority of the assessed value.)

Annual City Annexation Summary
LAFCO staff compiles data for each city in January summarizing annexations that have occurred in the previous year, as well as those in the past decade.
- View the 50-Year Summary (with information as of Dec. 31, 2010)
- View the 2011 Update (chart with updated data as of Dec. 31, 2011)

LAFCO History
Learn more about how Local Agency Formation Commissions were created and the role of Stanislaus LAFCO.