Refinance lenders in Rock County, Wisconsin
Fat Boy Data analyzed mortgage refinance activity in Rock County, Wisconsin to show which lenders are making these loans, how often they approve, how often borrowers accept the offer, and how much they typically finance. 2,774 applications were decided by 149 lenders between 2023 and 2025.
Rock County at a glance
How Rock County compares
What the data shows
Summit Credit Union made the most mortgage refinances in Rock County, WI, 421 of them.
Pennymac Loan Services, LLC approved the highest share of applications among lenders with at least 20 decisions here, 97% of 29.
The typical mortgage refinance here is $75K, 35% smaller than the Wisconsin typical of $115K.
Each dot is one lender, placed at its approval rate. Hover for the name and sample size.
Refinance lenders in Rock County
| Lender | Approval | Approved | Taken up | Typical loan | Loans made | |
|---|---|---|---|---|---|---|
| 1 | Summit Credit Union | 87% | 440 / 503 | 96% | $75K | 421 |
| 2 | Blackhawk Community Credit Union | 95% | 415 / 439 | 100% | $55K | 413 |
| 3 | Advia Credit Union | 84% | 292 / 346 | 98% | $75K | 285 |
| 4 | University Of Wisconsin Credit Union | 79% | 201 / 253 | 98% | $85K | 196 |
| 5 | Johnson Bank | 89% | 88 / 99 | 98% | $205K | 86 |
Ranked by lending volume. Approval is the share of decided applications a lender approved; taken up is the share of approvals the borrower accepted. Lenders with fewer than 20 decisions are marked as a limited sample and are never used for a “highest approval” claim. How these numbers are built.
Fat Boy found 144 more lenders.
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You are seeing the 5 largest mortgage refinance lenders in Rock County. Unlock every lender who decided one of these loans here, what they approved, how much borrowers actually took, and how far the nearest office is.
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