Moving to Katy: Pros, Cons & What to Know
Moving to Katy means moving to a fast-growing, tri-county Houston suburb rather than a single self-contained town -- the incorporated City of Katy is small (roughly 15 square miles), but the broader Katy area spans Harris, Fort Bend, and Waller counties and has been one of the fastest-growing parts of the Houston metro for over a decade. Most of the logistics are standard big-metro Texas relocation, with a few Katy-specific wrinkles worth knowing before move-in day.
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Learn moreA genuinely fast-growing area, though exact figures vary by source and geography
World Population Review puts the City of Katy's 2026 population at about 29,713, growing at roughly 4.72%-4.9% annually, while Texas Demographics projects a smaller 2026 figure of about 27,668 -- both are up sharply from the 2020 Census count of 22,437. That's the small incorporated city; the broader six-ZIP-code Katy area (spanning all three counties) is far larger and, per the Katy base record, grew 30.5% from 2014 to 2019 alone. Anyone comparing a "Katy population" figure across sources should first confirm which geography -- city or area -- is being measured.
Know which county (and which appraisal district) you're moving into
Because Katy sits at the literal tripoint of Harris, Fort Bend, and Waller counties, the specific address determines which county appraisal district handles property valuation, which county services apply, and which combination of tax rates stacks onto a given parcel (see the taxes topic). This is a genuinely more involved piece of pre-move research than a single-county suburb requires -- confirm the county for a specific address before assuming anything about taxes or jurisdiction.
Many Katy-area communities are served by a MUD, not city water
A large share of Katy-area subdivisions -- especially newer master-planned communities outside the small incorporated city limits -- get water and sewer service from a Municipal Utility District (MUD), an independent special district with its own rates and often its own small tax layered on top of standard county and school taxes, per regional Houston-relocation reporting. Confirm utility provider and MUD status for a specific address before assuming a single city-wide utility structure.
Texas's standard new-resident deadlines and deregulated electricity market apply here too
As anywhere in Texas, new residents have 90 days from their move-in date to get a Texas driver's license and a separate, shorter 30-day window to register a vehicle in the state (register the vehicle first, since DPS generally requires it before processing a license), per TxDMV and DPS guidance. Katy also sits in Texas's deregulated ERCOT electricity market, so new residents choose their own retail electric provider via the state's Power to Choose comparison site rather than calling a default utility.
Time a move around hurricane season if possible
Atlantic hurricane season runs June through November, and while Katy is roughly 30 miles inland with no direct hurricane wind exposure comparable to the coast, its documented flood-risk history (see insurance-hazard-costs) means heavy-rain events tied to tropical systems are a real scheduling variable. Movers targeting a late-summer or early-fall date should build in flexibility.
Key takeaways
- City of Katy's 2026 population is estimated at roughly 27,668 (Texas Demographics) to 29,713 (World Population Review, ~4.7%-4.9%/yr growth) -- both well up from 22,437 in the 2020 Census. This is the small incorporated city; the broader multi-county "Katy area" is much larger and grew 30.5% from 2014-2019 alone (per the base record).
- Katy sits at the tripoint of Harris, Fort Bend, and Waller counties -- confirm which county a specific address falls in before researching taxes or jurisdiction, since it materially changes the answer.
- Many Katy-area subdivisions get water/sewer from an independent Municipal Utility District (MUD) rather than a city utility, and MUDs often carry their own separate tax -- confirm status per address.
- Standard Texas new-resident rules apply: 90 days for a driver's license, 30 days for vehicle registration (register the vehicle first), and a deregulated ERCOT electricity market where you pick your own retail provider.
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