Boundary Atlas

Rocklin, California

Rocklin is a city in Placer County, California, with 71,601 residents in 2020. It is in California's 6th congressional district. Its state senate district is State Senate District 6; its state house district is Assembly District 5.

71,601residents (2020 Census)
19.8 sq miland area
4ZIP codes
1congressional district

County

CountyShare of residents
Placer County100%

Congressional district

Congressional districtShare of residents
California's 6th congressional district (CA-06)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (CA-06)Ami Bera (D)202-225-5716100%
U.S. SenatorAdam B. Schiff (D)202-224-3841statewide
U.S. SenatorAlex Padilla (D)202-224-3553 · contact formstatewide
State Senator (State Senate District 6)Roger Niello (R)916-464-3980100%
Assembly Member (Assembly District 5)Joe Patterson (R)916-435-0501100%

Elected in 2024 under CA's previous congressional map; this district's lines changed for the 120th Congress (seated January 3, 2027).

Officials serving now (members of Congress until January 3, 2027). Sources: State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).

Local government

State legislative districts

State senate districtShare of residents
State Senate District 6100%

State house districtShare of residents
Assembly District 5100%

ZIP codes

Percentages mark ZIPs only partly in Rocklin: the share of that ZIP's residents living in it.

Get this in your AI agent

Your agent can get Rocklin's counties and districts with shares, its ZIP codes (level='zcta'), and its boundary as GeoJSON (get_boundaries). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

related_geographies(id="us:place:0662364")

Rocklin here is the Census Bureau's place boundary as of January 1, 2025. Shares are of 2020 Census population. Districts are the maps in force for the November 3, 2026 election.