Exciting news! On October 27, 2025, our holding company, FirstSun Capital Bancorp and First Foundation Inc. jointly announced that we have entered into a definitive merger agreement. Read the full announcement on the FirstSun Investor Relations website: https://ir.firstsuncb.com/news/news-details/2025/FirstSun-Capital-Bancorp-and-First-Foundation-Inc--Combining-in-All-Stock-Merger/default.aspx
Important Fraud Alert: We have received reports of fraudulent calls appearing to be from Sunflower Bank. If someone contacts you claiming to be from Sunflower Bank or First National 1870 and asks you to provide online banking login credentials or account information, do not follow their instructions and hang up because #BanksNeverAskThat. Do not provide any details or visit any websites at their request. Please call our Customer Care directly at 888.827.5564 if you have any concerns.
Welcome to
Los Alamos, Trinity Dr First National 1870 Branch
The Los Alamos office at 1910 Trinity Drive borders the Historic Downtown Area and Community Centered Ashley Pond; where business and community discoveries are made! This location was the First Bank established in Los Alamos during the 1940’s as related to the infamous, Manhattan Project; the bank’s current location has continuously operated for over fifty years and is proud to be part of Los Alamos history!
Lobby Hours:
Drive Thru Hours:
Welcome, we look forward to serving you at our branch!
From valuable tools like online and mobile banking to taking advantage of our suite of banking services, we’ll help you find a solution that fits your unique financial needs.
Stop by or call our branch for information on these services and more:
- Checking accounts, including interest-bearing and with valuable perks
- Savings accounts
- Certificate of Deposit (CD) accounts
- Competitive-rate money market accounts
- Credit cards
- Small business loans
- Home loans