Looking for a pool builder in Marion, IL? Describe your project once and up to three licensed pool builders who work in Marion and Williamson County get back to you with a quote. It's free and there is no obligation.
Marion is home to about 17,021 people (2024 Census Bureau estimate), a growing community (+1.0% since 2020). With 1,182 people per sq mi, it is a suburban area. Long summers and backyard living make pools a frequent project here.
Marion at a glance
- Population (Census Bureau estimate, 2024)
- 17,021 (+1.0% since 2020)
- Rank in Illinois
- 151st of 1,294 cities and towns
- Land area
- 14 sq mi
- Population density
- 1,182 people per sq mi (suburban)
- Type
- City (Marion city)
- Main county
- Williamson County
What to check before hiring in Marion
- License and permit: in Illinois, check the builder's license and the pool permit.
- Barrier: plan the fence and gates required by code.
- HOA: check HOA rules before signing.
- Price drivers: size, type, finish, equipment, deck and access.
Useful official resources
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Pool Safely (CPSC)
Official information and guidance.
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ICC: International Code Council
Official information and guidance.
Services available in Marion
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In-ground pool construction
Design and construction of an in-ground pool with equipment, permit and barrier.
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Pool renovation
Resurfacing, tile, equipment and deck renovation of an existing pool.
Frequently asked questions in Marion
How much does a pool cost in Marion, IL?
It depends on type, size, finishes and access. Describe your project: builders who serve Marion reply with a quote.
When should I start?
Off-season planning often gets earlier construction dates.
Does a pool add value?
It depends on the market; in warm areas buyers often expect one.
Which licensed pool builders will contact me?
Up to three independent licensed pool builders who serve Marion and the surrounding area, chosen for the service you need. Your details are shared only with your consent.
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.