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County · code 48277

Lamar CountyTexas

Lamar County is in Texas and has its seat in Paris. The county was created on December 17, 1840, by the Republic of Texas from Red River County and named after Mirabeau B. Lamar.

  • Founded1840
  • County seatParis
  • Named forMirabeau B. Lamar
  • Land area907 sq mi + 26 sq mi water
  • Population50,088 2020 Census
  • Parcels mapped36,512 checked 14 October 2026
Open the free map Click any parcel in Lamar County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

DeltaChoctaw, OKHopkinsRed RiverFanninFranklinBryan, OK Paris Census outline · seat marked

Where it is

Lamar on the map of Texas

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

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Counties of Texas · Lamar highlighted

History

Formed in 1840 from Red River County

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

Lamar County was created from Red River County in December 1840 by the Republic of Texas, though it was not fully organized until February 1841. The county lost and regained territory through the creation and dissolution of nearby judicial and proposed counties between 1841 and 1871. When Texas became a state in 1845, Lamar became one of its counties.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries; the 5 that matter most are shown first.

  1. 1840
    Lamar County created Lamar created by the Republic of Texas from Red River; Lamar not fully organized.
    from Red River
    · Texas Repub. Laws 1840, 5th cong./p. 97
  2. 1841
    Lost territory Lamar lost to creation of Paschal (Judicial County).
    to Paschal
    · Texas Repub. Laws 1840, 5th cong./p. 56
  3. 1844
    Lost territory Lamar lost to Non-County Area 4 which was then attached to Lamar for administrative and judicial purposes. · Texas Repub. Laws 1843, 8th cong./p. 6
  4. 1845
    Became part of Texas Lamar became a county in the newly-established state of Texas. · Texas Repub. Laws 1845, 9th cong., spec. sess./pp. 4-6; U.S. Stat., vol. 9, res. 1 [1845]/p. 108; Van Zandt, 122
  5. 1870
    Lost territory Lamar lost to creation of Delta.
    to Delta
    · Texas Laws 1870, 12th leg., called sess., ch. 30/p. 42
Show all 11 changes (6 more)
  1. 1840
    Lamar County created Lamar created by the Republic of Texas from Red River; Lamar not fully organized.
    from Red River
    · Texas Repub. Laws 1840, 5th cong./p. 97
  2. 1841
    Lost territory Lamar lost to creation of Paschal (Judicial County).
    to Paschal
    · Texas Repub. Laws 1840, 5th cong./p. 56
  3. 1841
    Changed Lamar fully organized. · "Lamar County," New Handbook of Texas, 4:40
  4. c. 1842
    Gained territory Lamar gained from Paschal (Judicial County) when Republic of Texas Supreme Court ruled judicial counties unconstitutional.
    from Paschal
    · "Stockton v. Montgomery" in Dallam, 473-486
  5. 1842
    Changed Part of Lamar reverted to Non-County Area 4. · Texas Repub. Laws 1842, 7th cong./p. 1
  6. 1843
    Changed Non-County Area 4 attached to Lamar for administrative and judicial purposes. · Texas Repub. Laws 1842, 7th cong./pp. 37-38
  7. 1844
    Lost territory Lamar lost to Non-County Area 4 which was then attached to Lamar for administrative and judicial purposes. · Texas Repub. Laws 1843, 8th cong./p. 6
  8. 1845
    Became part of Texas Lamar became a county in the newly-established state of Texas. · Texas Repub. Laws 1845, 9th cong., spec. sess./pp. 4-6; U.S. Stat., vol. 9, res. 1 [1845]/p. 108; Van Zandt, 122
  9. c. 1868
    Changed Lamar authorized by Constitutional Convention to lose to creation of Delta (proposed) and Webster (proposed); creations did not take effect.
    DeltaWebster
    · Gammel, 6: "Ordinances Constitutional Convention 1868," 48-49
  10. 1870
    Lost territory Lamar lost to creation of Delta.
    to Delta
    · Texas Laws 1870, 12th leg., called sess., ch. 30/p. 42
  11. 1871
    Gained territory Lamar gained from Delta.
    from Delta
    · Texas Laws 1871, 12th leg., 2d sess., ch. 35/p. 30

Land and parcels

What the maps cover in Lamar

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

Lamar by the Census

Population
50,088 2020 Census count
Housing units
22,644 2020 Census count
Land area
907 square miles
Water area
26 square miles
People per sq mi
55 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.

Permits

County government

See your own lot on these maps

Open Lamar 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 Lamar County

When was Lamar County founded?
Lamar County was founded in 1840, formed from Red River County, and named after Mirabeau B. Lamar.
What is the county seat of Lamar County?
The county seat of Lamar County is Paris.
Is there an online parcel map for Lamar County?
Yes. A public source publishes a parcel map of 36,512 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Lamar County's boundary or name changed?
Lamar County was created in 1840 from Red River County. Since then the Atlas of Historical County Boundaries records 10 later changes, chiefly involving Delta County, Paschal County and Webster County.
Who issues building permits in Lamar County?
The county's page on building permits: Culvert Policy & Permit Information. Inside a city or town, ask that city first.
Is my lot in a flood zone?
We do not have flood maps for Lamar 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