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Jackson County, Mississippi

A shallow water table limits basements on 69% of Jackson County's mapped land, a higher share than 81% of US counties. Shrink-swell clay limits houses without basements on 0%.

None of the county is in drought on the October 13, 2026 Drought Monitor map. FEMA's flood data list 878 flood losses here since 2016, under 1% of them in buildings with basements. 45% of homes were built before 1980, against 50% nationally; the median home dates from 1984.

Data as of October 13, 2026 · sources

0%

expansive clay: shrink-swell limits slab homes

69%

high water table: limits basements

0%

in drought, October 13, 2026

45%

of homes built before 1980

Soil under Jackson County

Expansive clay (limits slab homes)0.0%
High water table (limits basements)68.8%
Septic fields very limited76.4%
Clay swell (LEP, by area)1.9%
High-swell land (LEP 6%+)4.7%
Mapped soil482,940 acres
Soil seriesShare hereSeries nationally: high water table
Benndale8%n/a
Vancleave5%n/a
Bayou5%n/a
Croatan4%n/a
Atmore4%n/a
Smithton4%n/a
Harrison County: 76%George County: 33%Mobile County: 47%Stone County: 33%Hancock County: 90%Greene County: 47%St. Bernard Parish: 47%Perry County: 37%Jackson County HarrisonGeorgeMobileStoneHancockGreeneSt. BernardPerryJackson
Jackson County (heavy outline) and nearby counties, shaded by high water table share.under 10%10-25%25-40%40-60%60%+

How we count · survey areas MS059 (2025-09-05)

What the numbers mean here

On 69% of Jackson County's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.

Rain over the 12 months to August 2026: 58.46 in, 7.28 in below the 1991-2020 average year of 65.74 in.

USDA rates 76% of the land very limited for septic absorption fields.

Drought

0% of the county is in drought (D1 or worse) on the October 13, 2026 map. Part of the county was in drought in 32 of the last 52 weeks; the most was 100% of its area, in 18 weeks, most recently on the September 8, 2026 map.

October 21, 2025Share of area in drought, weeklyOctober 13, 2026
Category, October 13, 2026Share of county
D0 abnormally dry or worse0%
D1 moderate drought or worse0%
D2 severe or worse0%
D3 extreme or worse0%
D4 exceptional0%

Flood losses since 2016

878 flood losses since 2016, $16.5 million paid. The worst year was 2020, with 290. Foundations of the buildings, where recorded: under 1% basements, 61% slabs, 4% crawl spaces, 35% elevated. Median water depth outside the building: 14 in.

YearFlood losses
201632
2017241
201812
201916
2020290
2021215
202210
202320
202411
20253
2026 to date28

Rain

Average year, 1991-202065.74 in
12 months to August 202658.46 in (-7.28)
202560.68 in (-5.06)
Wettest year since 18952021: 90.27 in
Driest year since 18951954: 36.21 in
Days with 1 inch or more, normal at BILOXI (23 mi away)20.5

Homes

Housing units63,558
Median year built1984
Built before 198045%
Built 2000 or later30%
Owner-occupied73%
Median value, owner-occupied$193,100
Single-family detached74%

What repairs cost

Published ranges from cost guides, not quotes. More sources, and where they disagree.

WorkRangeSource
Basement waterproofing, US $3,000 to $10,000 Fixr, February 6, 2026
Sump pump installation, US $800 to $2,000 Fixr, January 31, 2025
Crawl space encapsulation, US $2,000 to $8,000 Fixr, August 29, 2025

Nearby counties

PlaceDistanceExpansive clayHigh water table
Harrison County, MS 27 mi 1% 76%
George County, MS 28 mi 10% 33%
Mobile County, AL 30 mi 2% 47%
Stone County, MS 37 mi 10% 33%
Hancock County, MS 51 mi 2% 90%
Greene County, MS 52 mi 21% 47%
St. Bernard Parish, LA 53 mi 30% 47%
Perry County, MS 54 mi 12% 37%

Sources: USDA SSURGO (September 5, 2025) · US Drought Monitor (October 13, 2026) · FEMA NFIP v3 (September 9, 2026) · NOAA (August 2026) · Census ACS 2020-2024. Methods · Data status