Description: City boundaries are controlled by LAFCo and are recorded in the County Clerk Recorders Office. The polygons are a representation of those official recordings. The polygons have been reviewed by the Ventura County Surveyor's Office.Lineage: Ventura County GIS is the authoritative data source. This is downloaded from their GIS service.Update Frequency: As Needed. Last update: 2026-01-09Metadata Date: 2026-01-09
Service Item Id: 11d8652e24b4488d92979fc3122c4b61
Copyright Text: City of Simi Valley, Local Area Formation Commission (LAFCo), Ventura County Surveyor’s Office, Ventura County Information Technology Services Department – GIS Division
Description: These boundaries are based on Census data from the 2020 census. The next scheduled changes should be for the 2030 census data in 2032.Lineage: Unknown. Existing/legacy (prior to 2024)Update Frequency: As NeededMetadata Date: 2026-01-08
Service Item Id: 11d8652e24b4488d92979fc3122c4b61
Copyright Text: City of Simi Valley, Ventura County Clerk-Recorders – Election Division, Ventura County Information Technology Services Department – GIS Division
Description: Ventura County BoundaryLineage: Ventura County GIS is the authoritative data source. This is downloaded from their GIS service.Update Frequency: As Needed. Last update: 2026-01-09Metadata Date: 2026-01-09
Service Item Id: 11d8652e24b4488d92979fc3122c4b61
Copyright Text: Ventura County Information Technology Services Department – GIS Division
Description: A city urban restriction boundary (CURB) is a planning tool that draws a line separating areas designated for urban development from surrounding rural, agricultural, or natural lands, aiming to control sprawl, promote compact growth, and protect open spaces by limiting outward expansion. Inside the boundary, cities can develop efficiently, while outside, development is restricted, preserving farmland and natural resources. Lineage: Ventura County GIS is the authoritative data source. This is downloaded from their GIS service.Update Frequency: As Needed. Last update: 2026-01-09Metadata Date: 2026-01-09
Description: The Sphere of Influence represents the geographic extent to which a city can expand by annexation.Lineage: Ventura County GIS is the authoritative data source. This is downloaded from their GIS service.Update Frequency: As Needed. Last update: 2026-01-09Metadata Date: 2026-01-09
Service Item Id: 11d8652e24b4488d92979fc3122c4b61
Copyright Text: Local Area Formation Commission (LAFCo), Ventura County Surveyor’s Office, Ventura County Information Technology Services Department – GIS Division
Description: City of Simi Valley Area of Interest (AOI)Lineage: Unknown. Existing/legacy dataset (prior to 2024)Update Frequency: As NeededMetadata Date: 2026-01-08
Description: The City of Simi Valley does not do permits for locations outside of the City boundary in Tyler EPL (EnerGov).Lineage: Created by City GIS Coordinator in 2024.Update Frequency: As NeededMetadata Date: 2026-01-08