Union Gateway Agency

Serving our Montana residents looking for health or life insurance.
~ Let Us Make Things Simple For You ~

Call us today!
Our Coverage

Representing Blue Cross Blue Shield of Montana, Mountain Health Co-op, Pacific Source, WellCare, MUST & AFLAC


Looking to provide insurance through your company? We will help you choose.


Questions about how to enroll and prices of health insurance?  We can help you.


Are you turning 65 and being bombarded with options? Looking for a change in your supplement or prescription drug plan? We can make things simple for you.

About Us

We are your preferred agency.

Union Gateway Agency in Sidney, Montana has been providing insurance solutions to individuals and many types of businesses across Eastern Montana for years. 
We are your preferred local health insurance agency helping you with group health plans, family health and supplemental insurance products as well as Medicare supplements and prescription drug plans.

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Our commitment

We make it easy!

We pride ourselves on beings a hands on agency and are here to help you with all our question whether it be claims, payments, or policy questions. Insurance and benefits can be overwhelming. It’s our job to make things simple for you!

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Our Mission

"We are dedicated to providing superior services that our clients recommend to their families and friends. We work hard to continuously enhance our reputation for accessibility, professionalism, performance, and the depth and quality of our long-term relationships with our clients."

Greta Seitz  |  President/Business Manager

Our Partners

We specialize in helping businesses find high-quality group medical insurance with a focus on keeping employees happy and healthy.


202 3rd Ave. NW
Sidney, MT 59270