Boundary Atlas

Markham, Texas

Markham is a Census-designated place (an unincorporated community) in Matagorda County, Texas, with 908 residents in 2020. It is in Texas's 27th congressional district. Its state senate district is State Senate District 17; its state house district is State House District 30.

908residents (2020 Census)
2.2 sq miland area
1ZIP codes
1congressional district

County

CountyShare of residents
Matagorda County100%

Congressional district

Congressional districtShare of residents
Texas's 27th congressional district (TX-27)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (TX-27)Michael Cloud (R)202-225-7742100%
U.S. SenatorJohn Cornyn (R)202-224-2934 · contact formstatewide
U.S. SenatorTed Cruz (R)202-224-5922 · contact formstatewide
State Senator (State Senate District 17)Joan Huffman (R)281-497-2450100%
State Representative (State House District 30)A.J. Louderback (R)361-582-9712100%

Elected in 2024 under TX'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 17100%

State house districtShare of residents
State House District 30100%

ZIP codes

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

Get this in your AI agent

Your agent can get Markham's counties and districts with shares, its ZIP codes (level='zcta'), and its boundary as GeoJSON (get_boundaries). Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

related_geographies(id="us:place:4846716")

Markham here is the Census Bureau's place boundary as of January 1, 2025 (a Census-designated place, which has no municipal government). Shares are of 2020 Census population. Districts are the maps in force for the November 3, 2026 election.