Mortgage Lender Index

First Interstate Bank

First Interstate Bank received 4,082 applications in 2025 and made 2,443 mortgages, in 313 counties across 20 states. The median rate its borrowers got was 8.250% on a median loan of $105,000. Of 3,522 decisions, 1,036 were denials — 29.4%, most often for debt-to-income ratio.

Legal Entity Identifier549300RFSMIRUODUVW59
Applications received4,082
Mortgages made2,443
Denied1,036
Approved, not taken up43
Withdrawn or incomplete560
Loans bought from other lenders0
Median rate spread over the prime offer rate1.04 points
FDIC-insured bankYes: First Interstate Bank, 274 offices

By loan purpose

PurposeMortgages madeMedian rateMedian loanDenied
Home purchase507 6.875%$245,000 26.4%
Refinancing554 8.250%$105,000 26.5%
Cash-out refinancing36 7.125%$185,000 52.6%
Other purposes1,346 8.250%$85,000 30.7%

Where First Interstate Bank lends most

The 50 counties where it made the most mortgages in 2025. Each county page ranks every lender there.

CountyMortgages madeMedian rateDenied
Missoula County, MT 1228.250%20.0%
Deschutes County, OR 1228.250%28.1%
Flathead County, MT 798.250%26.6%
Ada County, ID 788.250%22.0%
Yellowstone County, MT 788.250%21.0%
Natrona County, WY 728.250%25.0%
Lawrence County, SD 688.250%25.5%
Jackson County, OR 658.500%37.1%
Minnehaha County, SD 608.250%31.1%
Gallatin County, MT 588.250%33.3%
Spokane County, WA 548.250%31.3%
Kootenai County, ID 518.250%23.5%
Lewis and Clark County, MT 488.250%21.3%
Laramie County, WY 447.813%31.3%
Sheridan County, WY 438.250%22.8%
Fremont County, WY 417.490%29.3%
Canyon County, ID 388.250%28.6%
Douglas County, NE 388.500%52.4%
Josephine County, OR 388.500%20.0%
Campbell County, WY 378.250%32.1%
Lake County, MT 358.125%22.5%
Park County, MT 318.000%20.0%
Marshall County, IA 308.313%31.8%
Codington County, SD 308.000%24.4%
Lancaster County, NE 288.250%20.0%
Polk County, IA 258.250%29.7%
Pennington County, SD 258.375%40.5%
Cascade County, MT 238.375%36.1%
Sarpy County, NE 238.250%31.4%
Brown County, SD 207.555%28.6%
Ravalli County, MT 198.250%36.7%
Lincoln County, SD 198.125%20.0%
Johnson County, WY 198.250%32.1%
Gem County, ID 188.438%21.7%
Story County, IA 178.750%5.6%
Webster County, IA 177.750%41.9%
Custer County, MT 178.375%21.7%
Jefferson County, MT 178.250%0.0%
Madison County, MT 178.000%22.7%
Meade County, SD 178.250%43.3%
Pottawattamie County, IA 167.315%23.8%
Fall River County, SD 168.500%41.4%
Albany County, WY 157.500%21.1%
Teton County, WY 157.250%37.5%
Elmore County, ID 148.250%6.7%
Klamath County, OR 148.250%21.1%
Douglas County, OR 138.625%23.5%
Marion County, OR 138.375%18.8%
Pinal County, AZ 128.500%52.0%
Cass County, IA 118.375%8.3%

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When First Interstate Bank’s figures are published for the next year, or restated.

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Counts, medians and denial shares are computed from the Home Mortgage Disclosure Act loan-level file for 2025, published by the Consumer Financial Protection Bureau through the FFIEC: every application a covered lender received, as the lender reported it. A median rate is what borrowers got, not what you will be offered — it depends on the loan, the property, your credit and the market on the day, and no figure here is a quote. A median over fewer than 10 loans is not shown: it is a number with no meaning and a real person's rate half-exposed. Those cells say "under 10 loans" and the count is still published. This is information, not advice, and no lender pays to appear.