First Interstate Bank

First Interstate Bank of Billings, MT, chartered 1916: 271 offices, $25.8bn in assets, a 9.42% leverage ratio. Straight from the federal record.

First Interstate Bank is an FDIC-insured bank headquartered in Billings, MT, chartered in 1916. It is supervised by the Federal Reserve and held by First Intrst Bancsystem. Every figure below is filed by the bank with its regulator and reproduced here unchanged.

Where First Interstate Bank has branches

271 full-service offices across 10 states, the largest being:

Iowa: 45 offices in 42 towns, holding $2.05bn at 30 June 2025
South Dakota: 45 offices in 34 towns, holding $3.41bn at 30 June 2025
Montana: 43 offices in 26 towns, holding $6.18bn at 30 June 2025
Oregon: 33 offices in 23 towns, holding $2.48bn at 30 June 2025
Nebraska: 28 offices in 17 towns, holding $1.93bn at 30 June 2025
Idaho: 20 offices in 14 towns, holding $1.64bn at 30 June 2025

First Interstate Bank on its latest Call Report, 30 June 2026

Total assets: $25.8bn
Total deposits: $21.7bn
Tier 1 leverage ratio: 9.42%
Total risk-based capital ratio: 15.46%
Noncurrent loans, as a share of loans: 1.12%
Return on assets: 1.21%
Net interest margin: 3.55%
Staff: 3,016

First Interstate Bank by town

Towns where it runs more than one office, busiest first. Each opens every one of its branches there.

First Interstate Bank in Billings, MT — 8 branches
First Interstate Bank in Omaha, NE — 8 branches
First Interstate Bank in Sioux Falls, SD — 7 branches
First Interstate Bank in Bend, OR — 7 branches
First Interstate Bank in Lincoln, NE — 5 branches
First Interstate Bank in Boise, ID — 4 branches
First Interstate Bank in Medford, OR — 4 branches
First Interstate Bank in Coeur D Alene, ID — 3 branches
First Interstate Bank in Kalispell, MT — 3 branches
First Interstate Bank in Great Falls, MT — 3 branches
First Interstate Bank in Bozeman, MT — 3 branches
First Interstate Bank in Helena, MT — 3 branches
First Interstate Bank in Rapid City, SD — 3 branches
First Interstate Bank in Missoula, MT — 3 branches
First Interstate Bank in Casper, WY — 2 branches
First Interstate Bank in Sheridan, WY — 2 branches
First Interstate Bank in Jackson, WY — 2 branches
First Interstate Bank in Gillette, WY — 2 branches
First Interstate Bank in Cheyenne, WY — 2 branches

Compare First Interstate Bank against every other bank with a branch in Montana, or find the offices nearest you.

Charter and office records from the FDIC BankFind Suite; capital, loan and earnings figures from the bank's own Call Report; deposits by office from the FDIC Summary of Deposits, counted each 30 June.