Parcel Chartplaces Open the free map

County · code 06099

Stanislaus CountyCalifornia

Stanislaus County, California, was created on April 5, 1854, from Tuolumne County, with Modesto as its seat. The county was named after Estanislao.

  • Founded1854
  • County seatModesto
  • Named forEstanislao
  • Land area1,496 sq mi + 18 sq mi water
  • Population552,878 2020 Census
  • Parcels mapped168,915 checked 15 October 2026
Open the free map Click any parcel in Stanislaus County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

MercedSan JoaquinSanta ClaraCalaverasAlamedaMariposaTuolumne Modesto Census outline · seat marked

Where it is

Stanislaus on the map of California

California has 58 counties and county equivalents, each with its own records office. Shapes with a page are links.

Alameda CountyAlpine CountyAmador CountyButte CountyCalaveras CountyColusa CountyContra Costa CountyDel Norte CountyEl Dorado CountyFresno CountyGlenn CountyHumboldt CountyImperial CountyInyo CountyKern CountyKings CountyLake CountyLassen CountyLos Angeles CountyMadera CountyMarin CountyMariposa CountyMendocino CountyMerced CountyModoc CountyMono CountyMonterey CountyNapa CountyNevada CountyOrange CountyPlacer CountyPlumas CountyRiverside CountySacramento CountySan Benito CountySan Bernardino CountySan Diego CountySan Francisco CountySan Joaquin CountySan Luis Obispo CountySan Mateo CountySanta Barbara CountySanta Clara CountySanta Cruz CountyShasta CountySierra CountySiskiyou CountySolano CountySonoma CountySutter CountyTehama CountyTrinity CountyTulare CountyTuolumne CountyVentura CountyYolo CountyYuba CountyStanislaus County Stanislaus
Counties of California · Stanislaus highlighted

History

Formed in 1854 from Tuolumne County

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

Stanislaus County was created from Tuolumne County on April 5, 1854. In 1860, Stanislaus gained territory from San Joaquin County. An 1866 legislative act authorized a re-survey of the Stanislaus-Merced line that would have resulted in loss of territory to Merced County, but the loss did not take effect.

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

  1. 1854
    Stanislaus County created Stanislaus created from Tuolumne.
    from Tuolumne
    · Calif. Stats. 1854, 5th sess., chs. 35, 81/pp. 40-41, 191-194
  2. 1855
    Boundary clarified Boundary between Stanislaus and Tuolumne clarified (no change).
    with Tuolumneno change
    · Calif. Stats. 1855, 6th sess., ch. 194/p. 245
  3. 1860
    Gained territory Stanislaus gained from San Joaquin.
    from San Joaquin
    · Calif. Stats. 1860, 11th sess., ch. 62/pp. 34-35
  4. 1866
    Changed Legislature authorized a re-survey of the Stanislaus-Merced line, established in 1854, that would have resulted in Stanislaus losing to Merced. Loss did not take effect; see 13 February 1868.
    Stanislaus-MercedMerced
    · Calif. Stats. 1865, 16th sess., ch. 191/p. 172; Outcalt, 118-119, 122-123
  5. 1868
    Boundary clarified Boundary between Stanislaus and Merced redefined to confirm 1854 Stanislaus line; see 8 March 1866 (no change).
    with Mercedno change
    · Calif. Stats. 1867, 17th sess., ch. 57/p. 56
  6. 1986
    Boundary clarified Stanislaus boundaries clarified (no change).
    no change
    · Calif. Stats. 1985-1986, reg. sess., ch. 248, sec. 80/p. 1239

Land and parcels

What the maps cover in Stanislaus

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

Stanislaus by the Census

Population
552,878 2020 Census count
Housing units
183,140 2020 Census count
Land area
1,496 square miles
Water area
18 square miles
People per sq mi
370 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

Zoning and code

County government

See your own lot on these maps

Open Stanislaus 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.

Open the free map no sign-in Pro early access

Questions

Common questions about Stanislaus County

When was Stanislaus County founded?
Stanislaus County was founded in 1854, formed from Tuolumne County, and named after Estanislao.
What is the county seat of Stanislaus County?
The county seat of Stanislaus County is Modesto.
Is there an online parcel map for Stanislaus County?
Yes. Stanislaus County publishes a parcel map of 168,915 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Stanislaus County's boundary or name changed?
Stanislaus County was created in 1854 from Tuolumne County. Since then the Atlas of Historical County Boundaries records 2 later changes, chiefly involving Merced County, San Joaquin County and Stanislaus-Merced County.
Who issues building permits in Stanislaus County?
The county's page on building permits: BUILDING PERMIT SERVICES. Inside a city or town, ask that city first.
Is my lot in a flood zone?
We do not have flood maps for Stanislaus 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