Boundary Atlas

ZIP code 63033: Florissant, MO

ZIP code 63033 is in Florissant (46% of residents), Black Jack (15%) and Old Jamestown (3.2%), in St. Louis County, Missouri. 35% of its residents live outside city limits. It is in Missouri's 1st congressional district. Its state senate district is State Senate District 13; its state house districts are State House District 68 (46%), State House District 75 (33%), State House District 67 (19%) and State House District 73 (1.0%).

43,175residents (2020 Census)
12.2 sq miland area
3cities and towns
1congressional district
41voting precincts

See it on the mapAll of Missouri

City and county

City or townShare of ZIP residents
Florissant46%
Black Jack15%
Old Jamestown3.2%

CountyShare of ZIP residents
St. Louis County100%

Town or county subdivisionShare of ZIP residents
Florissant township43%
Spanish Lake township36%
Ferguson township21%

Congressional district

Congressional districtShare of ZIP residents
Missouri's 1st congressional district (MO-01)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (MO-01)Wesley Bell (D)202-225-2406100%
U.S. SenatorEric Schmitt (R)202-224-5721 · contact formstatewide
U.S. SenatorJosh Hawley (R)202-224-6154 · contact formstatewide
State Senator (State Senate District 13)Angela Mosley (Democratic)100%
State Representative (State House District 68)Kem Smith (Democratic)46%
State Representative (State House District 75)Chanel Mosley (Democratic)33%
State Representative (State House District 67)Tonya Rush (Democratic)19%
State Representative (State House District 73)Raychel Proudie (Democratic)1.0%

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 ZIP residents
State Senate District 13100%

State house districtShare of ZIP residents
State House District 6846%
State House District 7533%
State House District 6719%
State House District 731.0%

Voting precincts

41 voting precincts overlap ZIP 63033. Map them, with each precinct's share of the ZIP's residents.

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Your agent can get these cities, counties, districts and precincts with their shares, and their GeoJSON boundaries, from Boundary Atlas. Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

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ZIP 63033 here is the Census Bureau's ZIP Code Tabulation Area, which approximates the USPS ZIP Code; PO-box-only ZIPs have none. Districts are the maps in force for the November 3, 2026 election.