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County · code 48311

McMullen CountyTexas

McMullen County, in Texas, has Tilden as its county seat and was fully organized in 1877. It is named after John McMullen.

  • Founded1877
  • County seatTilden
  • Named forJohn McMullen
  • Land area1,140 sq mi + 17 sq mi water
  • Population600 2020 Census
  • Parcels mapped4,159 checked 16 October 2026
Open the free map Click any parcel in McMullen County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

Live OakLa SalleAtascosaDuval Tilden Census outline · seat marked

Where it is

McMullen on the map of Texas

Texas has 254 counties and county equivalents, each with its own records office. Shapes with a page are links.

Anderson CountyAndrews CountyAngelina CountyAransas CountyArcher CountyArmstrong CountyAtascosa CountyAustin CountyBailey CountyBandera CountyBastrop CountyBaylor CountyBee CountyBell CountyBexar CountyBlanco CountyBorden CountyBosque CountyBowie CountyBrazoria CountyBrazos CountyBrewster CountyBriscoe CountyBrooks CountyBrown CountyBurleson CountyBurnet CountyCaldwell CountyCalhoun CountyCallahan CountyCameron CountyCamp CountyCarson CountyCass CountyCastro CountyChambers CountyCherokee CountyChildress CountyClay CountyCochran CountyCoke CountyColeman CountyCollin CountyCollingsworth CountyColorado CountyComal CountyComanche CountyConcho CountyCooke CountyCoryell CountyCottle CountyCrane CountyCrockett CountyCrosby CountyCulberson CountyDallam CountyDallas CountyDawson CountyDeaf Smith CountyDelta CountyDenton CountyDeWitt CountyDickens CountyDimmit CountyDonley CountyDuval CountyEastland CountyEctor CountyEdwards CountyEllis CountyEl Paso CountyErath CountyFalls CountyFannin CountyFayette CountyFisher CountyFloyd CountyFoard CountyFort Bend CountyFranklin CountyFreestone CountyFrio CountyGaines CountyGalveston CountyGarza CountyGillespie CountyGlasscock CountyGoliad CountyGonzales CountyGray CountyGrayson CountyGregg CountyGrimes CountyGuadalupe CountyHale CountyHall CountyHamilton CountyHansford CountyHardeman CountyHardin CountyHarris CountyHarrison CountyHartley CountyHaskell CountyHays CountyHemphill CountyHenderson CountyHidalgo CountyHill CountyHockley CountyHood CountyHopkins CountyHouston CountyHoward CountyHudspeth CountyHunt CountyHutchinson CountyIrion CountyJack CountyJackson CountyJasper CountyJeff Davis CountyJefferson CountyJim Hogg CountyJim Wells CountyJohnson CountyJones CountyKarnes CountyKaufman CountyKendall CountyKenedy CountyKent CountyKerr CountyKimble CountyKing CountyKinney CountyKleberg CountyKnox CountyLamar CountyLamb CountyLampasas CountyLa Salle CountyLavaca CountyLee CountyLeon CountyLiberty CountyLimestone CountyLipscomb CountyLive Oak CountyLlano CountyLoving CountyLubbock CountyLynn CountyMcCulloch CountyMcLennan CountyMadison CountyMarion CountyMartin CountyMason CountyMatagorda CountyMaverick CountyMedina CountyMenard CountyMidland CountyMilam CountyMills CountyMitchell CountyMontague CountyMontgomery CountyMoore CountyMorris CountyMotley CountyNacogdoches CountyNavarro CountyNewton CountyNolan CountyNueces CountyOchiltree CountyOldham CountyOrange CountyPalo Pinto CountyPanola CountyParker CountyParmer CountyPecos CountyPolk CountyPotter CountyPresidio CountyRains CountyRandall CountyReagan CountyReal CountyRed River CountyReeves CountyRefugio CountyRoberts CountyRobertson CountyRockwall CountyRunnels CountyRusk CountySabine CountySan Augustine CountySan Jacinto CountySan Patricio CountySan Saba CountySchleicher CountyScurry CountyShackelford CountyShelby CountySherman CountySmith CountySomervell CountyStarr CountyStephens CountySterling CountyStonewall CountySutton CountySwisher CountyTarrant CountyTaylor CountyTerrell CountyTerry CountyThrockmorton CountyTitus CountyTom Green CountyTravis CountyTrinity CountyTyler CountyUpshur CountyUpton CountyUvalde CountyVal Verde CountyVan Zandt CountyVictoria CountyWalker CountyWaller CountyWard CountyWashington CountyWebb CountyWharton CountyWheeler CountyWichita CountyWilbarger CountyWillacy CountyWilliamson CountyWilson CountyWinkler CountyWise CountyWood CountyYoakum CountyYoung CountyZapata CountyZavala CountyMcMullen County McMullen
Counties of Texas · McMullen highlighted

History

Founded in 1877

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

McMullen County was created in 1858 from Atascosa, Live Oak, and Nueces Counties, but remained unorganized for nearly two decades. It was attached to Live Oak County for judicial purposes in 1860, and went through boundary adjustments with neighboring counties before being fully organized and detached from Live Oak in 1877.

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

  1. 1858
    McMullen County created McMullen created from Atascosa, Live Oak, Nueces, Bexar Land District, and Non-County Area 23; McMullen not fully organized.
    from Atascosafrom Live Oakfrom Nueces
    · Texas Laws 1857, 7th leg., ch. 75, sec. 7/p. 88
  2. 1860
    Changed McMullen attached to Live Oak "for all judicial purposes."
    Live Oak
    · Texas Laws 1859, 8th leg., reg. sess., gen., ch. 87, sec. 7/p. 120
  3. 1862
    Gained territory McMullen gained from Duval and Nueces, exchanged with Live Oak (acts repealed 4 December 1863).
    from Duvalfrom Nuecesfrom Live Oak
    · Texas Laws 1861, 9th leg., reg. sess., chs. 29-30/pp. 27-29
  4. 1863
    Exchanged territory McMullen exchanged with Live Oak, lost to Duval and Nueces (repealed acts of 3 January 1862).
    with Live Oakwith Duvalwith Nueces
    · Texas Laws 1863, 10th leg., reg. sess., spec., ch. 8/p. 5
  5. c. 1877
    Changed McMullen fully organized, detached from Live Oak.
    Live Oak.
    · "McMullen County," New Handbook of Texas, 4:438
  6. 1879
    Changed La Salle detached from Webb, attached to McMullen "for judicial and surveying purposes."
    La SalleWebb
    · Texas Laws 1879, 16th leg., reg. sess., ch. 29/p. 22
  7. c. 1880
    Changed La Salle fully organized, detached from McMullen.
    La Salle
    · Ludeman, 7

Land and parcels

What the maps cover in McMullen

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

McMullen by the Census

Population
600 2020 Census count
Housing units
405 2020 Census count
Land area
1,140 square miles
Water area
17 square miles
People per sq mi
<1 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

Who to ask before you build, dig or sell

Official county pages only. We link to them; we do not copy them, because they change.

Inside a city or town, permits usually come from that city rather than the county.

Records

Permits

County government

See your own lot on these maps

Open McMullen 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 McMullen County

When was McMullen County founded?
McMullen County was founded in 1877, and named after John McMullen.
What is the county seat of McMullen County?
The county seat of McMullen County is Tilden.
Is there an online parcel map for McMullen County?
Yes. McMullen County publishes a parcel map of 4,159 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has McMullen County's boundary or name changed?
McMullen County was created in 1858. Since then the Atlas of Historical County Boundaries records 6 later changes, chiefly involving Live Oak County, Duval County and La Salle County.
Who issues building permits in McMullen County?
The county's page on building permits: Drilling Permit Inquiry. Inside a city or town, ask that city first.
Is my lot in a flood zone?
We do not have flood maps for McMullen 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