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Flood Risk Good to know

Check the FEMA flood map before buying property in Ellis County

Ellis County Home & Property

Ellis County has flood-prone spots along its creeks and near the Trinity River. FEMA has issued flood maps for communities across the county. Ellis County takes part in the National Flood Insurance Program (NFIP), which means homeowners can buy federally backed flood insurance here.

If your lender sees your home in a high-risk flood zone, they will require flood insurance. Flooding can still happen even outside a mapped high-risk zone. Use the FEMA Flood Map Service Center to look up any address before you buy.

Content last revised 2026-07-11

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More stories and useful context near Ellis County

A balanced next shelf: local character first, with practical context close by.

Stories & local character

Cotton farming once made Ellis County a powerhouse in Texas agriculture

When the Houston and Texas Central Railroad arrived in 1872, Ellis County shifted from cattle range to one of Texas's top cotton-producing counties.

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Practical

You need a permit before installing a septic system in Ellis County

Homes outside city sewer service areas need an on-site sewage system, and Ellis County adopted its own rules for permitting and inspecting those systems.

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Stories & local character

I-35E is the main artery through Ellis County — and it can get congested

Interstate 35E runs north-south through Ellis County and is the primary route for commuters traveling to and from the Dallas area.

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Good to know

Ellis County sits on Blackland Prairie — clay-rich soil that swells and shrinks

The heavy clay soils of the Blackland Prairie that cover Ellis County expand when wet and shrink when dry, which can damage foundations and pipes.

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Place pages in Ellis County

AlmaBardwellCedar HillEnnisFerrisGarrett

Nearby county shelves

Navarro (24) Dallas (64) Hill (12) Johnson (32) Kaufman (20) Tarrant (67)