# Planned developments in Williamson County, IL

Boardwalk found 110+ planned projects in Williamson County, IL in public filings from the last 12 months. The latest is on the Marion City Council agenda for Oct 1, 2026.

Data as of Oct 19, 2026. Updated monthly. Page: https://boardwalkai.com/development/illinois/williamson/

## Williamson County at a glance

| Measure | Value |
|---|---|
| Projects, last 12 months | 110+ |
| New in the last 30 days | 1 |
| Most common type | Infrastructure |
| Latest filing | Oct 1, 2026, Marion City Council |
| Sources we check | 2 |

Last 12 months, duplicates merged. Includes private, public, and small jobs. How we count: https://boardwalkai.com/coverage/#how-we-count

## What's planned in Williamson County

By type, last 12 months.

| Type | Projects | Share |
|---|---|---|
| Infrastructure | 45 | 40% |
| Development decisions | 31 | 27% |
| Residential | 17 | 15% |
| Public and institutional | 10 | 9% |
| Commercial | 8 | 7% |
| Agricultural | 2 | 2% |

## Recent projects in Williamson County

| Project | Location | Developer | Type | Size | Stage | Latest meeting |
|---|---|---|---|---|---|---|
| Admiral Parkway Hardware Redevelopment Agreement | Marion, IL | Admiral Parkway Hardware, LLC | Retail | Not stated in filing | Seeking approval | Sep 14, 2026 |
| $388,895 Joseph Cannon Way Expansion | Marion, IL | Not stated | Transportation | Not stated in filing | Early planning | Aug 24, 2026 |
| Joseph Cannon Way Expansion to Three-Lane Road | Marion, IL | Not stated | Roads and highways | Not stated in filing | Early planning | Aug 24, 2026 |
| Civil Circle Boulevard Pedestrian and Cyclist Improvements | Marion, IL | Not stated | Sidewalks | Not stated in filing | Early planning | Aug 24, 2026 |
| $969K West Monroe Street Water Main Replacement | Herrin, IL | Not stated | Pipelines | Not stated in filing | Early planning | Aug 24, 2026 |
| West Monroe Street Watermain Replacement Project | Herrin, IL | Not stated | Pipelines | Not stated in filing | Early planning | Aug 24, 2026 |
| Bandyville Road Engineering Agreement | Herrin, IL | Horner & Shifrin, Inc. | Roads and highways | Not stated in filing | Approved | Aug 24, 2026 |
| Park Improvements RFP Review | Cambria, IL | Not stated | Parks | Not stated in filing | Out to bid | Jul 29, 2026 |
| OSLAD Grant Park Improvements Engineering Services RFP | Cambria, IL | Not stated | Parks | Not stated in filing | Approved | Jul 7, 2026 |
| Residential TIF I Redevelopment Agreement | Marion, IL | Brynnlayne Properties, LLC | Residential | Not stated in filing | Seeking approval | May 11, 2026 |
| T&R Prime Properties Residential TIF Redevelopment Agreement | Marion, IL | T&R Prime Properties, LLC | Residential | Not stated in filing | Approved | Apr 13, 2026 |

Showing 11 of 110+ projects. A free trial opens the full records and documents.

Samples show projects filed by companies or public bodies.

## Cities in Williamson County

- [Marion, IL](https://boardwalkai.com/development/illinois/marion-city/) · 35 projects
- Cambria, IL · 25 projects
- Carterville, IL · 23 projects
- [Herrin, IL](https://boardwalkai.com/development/illinois/herrin/) · 23 projects
- Crainville, IL · 7 projects
- Colp, IL · Checked, no projects in 12 months
- Crab Orchard, IL · Checked, no projects in 12 months
- Energy, IL · Checked, no projects in 12 months
- Johnston City, IL · Checked, no projects in 12 months

## Nearby places

- Saline County, IL · 40 projects
- [Franklin County, IL](https://boardwalkai.com/development/illinois/franklin/) · 65 projects
- [Johnson County, IL](https://boardwalkai.com/development/illinois/johnson/) · 20 projects
- [Jackson County, IL](https://boardwalkai.com/development/illinois/jackson/) · 91 projects
- [Union County, IL](https://boardwalkai.com/development/illinois/union/) · 23 projects
- Hamilton County, IL · 9 projects

All places in Illinois: [Illinois](https://boardwalkai.com/development/illinois/)

## Questions about Williamson County

### What's planned in Williamson County, IL?

Boardwalk found 110+ planned projects in Williamson County, IL in the last 12 months. The latest is on the Marion City Council agenda for Oct 1, 2026.

### Where does this data come from?

Boardwalk's Williamson County projects come from public meeting records, such as Marion City Council agendas and minutes. Each one links to the original filing.

### How current is it?

Boardwalk checks Williamson County's public records at least once a week; the last check was Oct 18, 2026. These counts are as of Oct 19, 2026 and refresh monthly.

### Can I get an Alert for new Williamson County projects?

Yes, a Boardwalk Alert emails you new Williamson County projects daily, weekly, or monthly. Start with a 7-day free trial, no credit card needed.

## Get the full data

- **Count for free.** Connect Boardwalk to Claude or ChatGPT and ask how many projects match. Counting is free during your trial and on every plan. [Use it in Claude or ChatGPT](https://boardwalkai.com/mcp/)
- **Open the records.** Start a 7-day free trial, no credit card. It includes 50 project records. [Start free trial](https://boardwalkai.com/auth/signup/)
- **Use it in your tools.** CSV export, the API, and the MCP server come with every plan. [API docs](https://boardwalkai.com/docs/api/)
- **Download these numbers.** [williamson.json](https://boardwalkai.com/data/places/illinois/williamson.json) · [williamson.md](https://boardwalkai.com/development/illinois/williamson/index.md)

## How to cite

Source: Boardwalk, "Planned developments in Williamson County, IL", boardwalkai.com/development/illinois/williamson/, data as of Oct 19, 2026.

How we count: https://boardwalkai.com/coverage/#how-we-count