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County · code 48057

Calhoun CountyTexas

Calhoun County is a Texas county formed in 1846 with its seat in Port Lavaca. Named after John C. Calhoun, it was created from parts of Jackson and Victoria counties.

  • Founded1846
  • County seatPort Lavaca
  • Named forJohn C. Calhoun
  • Land area507 sq mi + 526 sq mi water
  • Population20,106 2020 Census
  • Parcels mapped22,676 checked 15 October 2026
Open the free map Click any parcel in Calhoun County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

VictoriaJacksonAransasRefugioMatagorda Port Lavaca Census outline · seat marked

Where it is

Calhoun on the map of Texas

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Counties of Texas · Calhoun highlighted

History

Formed in 1846 from Jackson County and Victoria County

An old deed may name a county that no longer exists, or a boundary that has since moved.

Calhoun County was created on April 4, 1846 from parts of Jackson and Victoria counties, but was not fully organized until September 22, 1846. The county gained territory from Victoria and Refugio counties through boundary adjustments between 1856 and 1871, and in 1947 its boundaries were extended to the continental shelf in the Gulf of Mexico.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries.

  1. 1846
    Calhoun County created Calhoun created from Non-County Area 6 and Non-County Area 7 (formerly parts of Jackson and Victoria); Calhoun not fully organized.
    from Jacksonfrom Victoria
    · Texas Laws 1846, 1st leg./p. 48
  2. 1846
    Changed Calhoun fully organized. · HRS Texas, Calhoun, 7
  3. 1856
    Gained territory Calhoun gained from Victoria, lost part of Matagorda Island and part of San Antonio Bay to Refugio.
    from Victoriafrom Refugio
    · Texas Laws 1856, 6th leg., adj. sess., ch. 177/p. 104
  4. 1860
    Gained territory Calhoun gained part of Matagorda Island and part of San Antonio Bay from Refugio.
    from Refugio
    · Texas Laws 1859, 8th leg., reg. sess., spec., ch. 178/p. 196
  5. 1871
    Gained territory Calhoun gained from Refugio.
    from Refugio
    · Texas Laws 1871, 12th leg., 2d sess., ch. 1/p. 1
  6. 1947
    Changed Boundaries of Calhoun extended to the continental shelf in the Gulf of Mexico. · Texas Laws 1947, 50th leg., reg. sess., ch. 287/p. 490

Land and parcels

What the maps cover in Calhoun

Who publishes each layer, how good it is, and when we last checked.

Official
from the office that keeps the record
Good enough
a reliable statewide or national copy
Fallback
a guide only; check the official record
Missing
nothing public found yet

People and land

Calhoun by the Census

Population
20,106 2020 Census count
Housing units
10,539 2020 Census count
Land area
507 square miles
Water area
526 square miles · 51% of the county, including large bodies of water
People per sq mi
40 population ÷ land area

Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.

Rules and offices

Calhoun County's official site

We have found the county's site but not its offices yet; start there.

County government

See your own lot on these maps

Open Calhoun County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.

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Questions

Common questions about Calhoun County

When was Calhoun County founded?
Calhoun County was founded in 1846, formed from Jackson County and Victoria County, and named after John C. Calhoun.
What is the county seat of Calhoun County?
The county seat of Calhoun County is Port Lavaca.
Is there an online parcel map for Calhoun County?
Yes. Calhoun County publishes a parcel map of 22,676 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Calhoun County's boundary or name changed?
Calhoun County was created in 1846 from Jackson County and Victoria County. Since then the Atlas of Historical County Boundaries records 5 later changes, chiefly involving Refugio County and Victoria County.
Is my lot in a flood zone?
We do not have flood maps for Calhoun County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby

Counties next door