Boundary Atlas

Bay St. Louis, Mississippi

Bay St. Louis is a city in Hancock County, Mississippi, with 9,284 residents in 2020. It is in Mississippi's 4th congressional district. It spans 2 state senate districts. Its state house district is State House District 122.

9,284residents (2020 Census)
14.7 sq miland area
1ZIP codes
1congressional district

County

CountyShare of residents
Hancock County100%

Congressional district

Congressional districtShare of residents
Mississippi's 4th congressional district (MS-04)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (MS-04)Mike Ezell (R)202-225-5772100%
U.S. SenatorCindy Hyde-Smith (R)202-224-5054 · contact formstatewide
U.S. SenatorRoger F. Wicker (R)202-224-6253 · contact formstatewide
State Senator (State Senate District 48)Mike Thompson (R)52%
State Senator (State Senate District 46)Philman Ladner (R)48%
State Representative (State House District 122)Brent Anderson (R)100%

Elected under MS's previous legislative map; the district's lines changed for 2026.

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 4852%
State Senate District 4648%

State house districtShare of residents
State House District 122100%

ZIP codes

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

Get this in your AI agent

Your agent can get Bay St. Louis'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:2803980")

Bay St. Louis 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.