Best Credit Unions for Auto Loans in Sioux Falls South Dakota

Best Credit Unions for Auto Loans in Sioux Falls, SD (2026)

TL;DR

• Sioux Falls credit unions are offering new car rates starting at 4.74% APR, well below South Dakota's state average of 10.94%.
• Bluestone FCU and Levo Credit Union lead with 4.74% APR; Service First FCU publishes the most detailed rate tiers so you know exactly what to expect.
• Join one, get pre-approved, then shop. Don't let a dealership's financing desk be your first call.

Key Numbers at a Glance

Top Credit Unions in Sioux Falls for Auto Loans

1. Bluestone Federal Credit Union

Best for: Lowest advertised rate, all vehicle model years

Bluestone FCU sits at 3400 S Sycamore Ave in Sioux Falls and leads the pack with rates as low as 4.74% APR on auto loans. What makes them stand out is that they don't penalize you for buying an older vehicle. Their low rates apply regardless of the car's model year, which is genuinely rare.

• New and used car APR: As low as 4.74%
• Pre-approval: Available online before you set foot on a lot
• Membership: Open to those who live, work, or worship in the Sioux Falls area

Pre-approval (a lender's conditional commitment to loan you a specific amount at a specific rate, before you've chosen a car) is a smart move here. Walk into any dealership knowing your number, and you hold the leverage.

How to join: Visit bluestonefcu.org, confirm your eligibility, open a share savings account (typically $5 to $25), and apply for your auto loan online or in branch.

2. Levo Credit Union

Best for: Community-focused borrowers who want proof of member savings

Levo Credit Union matches Bluestone's headline rate at 4.74% APR and backs it up with a compelling stat: their members have collectively saved $93,506 in lower rates compared to what banks would have charged. That's not a marketing slogan. That's real money staying in Sioux Falls households.

• New and used car APR: As low as 4.74%
• Loan terms: Contact Levo directly for current term options
• Membership: Available to South Dakota residents in communities Levo serves

Levo is a good fit if you want a lender that's genuinely invested in the local economy. They're not a branch of a national bank running a Sioux Falls outpost. They're here.

How to join: Head to levo.org, check eligibility for your zip code, open a membership account, and apply for your loan online or by phone.

3. Service First Federal Credit Union

Best for: Rate transparency and knowing exactly what you'll pay

Service First FCU is the most transparent lender on this list. They publish a full rate grid by credit score tier and loan term, so there are no surprises. Here's what their current schedule looks like (rates effective December 1, 2025):

New Car Rates (750+ credit score):

• 6 to 48 months: 4.90% APR
• 60 months: 5.10% APR
• 72 months: 5.30% APR
• 84 months: 5.50% APR

Used Car Rates (750+ credit score):

• 6 to 48 months: 6.30% APR
• 60 months: 6.50% APR
• 72 months: 6.70% APR

Rates step up for lower credit score tiers (down to 599+), but the published grid means you can estimate your payment before you ever talk to a loan officer. No hidden application fees. No origination fees.

• Loan terms: 6 to 84 months
• Membership: Open to residents and workers in Minnehaha County (Sioux Falls) and other select South Dakota counties

How to join: Visit servicefirstfcu.org, confirm your county qualifies, open a savings account, and apply online or in person.

4. Black Hills Federal Credit Union

Best for: Borrowers who also want RV, boat, or truck financing under one roof

Black Hills FCU has a branch right in Sioux Falls at 3701 E 10th St, plus locations in Rapid City. Their vehicle loan rates start at 5.10% APR, covering cars, trucks, SUVs, RVs, and boats. If you're financing a vehicle that isn't a standard sedan, they're worth a call.

• New and used car APR: As low as 5.10%
• Vehicle types: Cars, trucks, SUVs, RVs, boats
• Membership: Open to South Dakota residents, including the Sioux Falls area

Their rate is slightly higher than Bluestone or Levo, but their branch presence and multi-vehicle lending make them a strong option for households with more than one financing need.

How to join: Visit bhfcu.com, check membership eligibility, open a share account, and apply online or at the Sioux Falls branch.

5. Siouxland Federal Credit Union

Best for: Pre-approval focus and local eligibility

Siouxland Federal Credit Union serves the Sioux Falls region with a strong emphasis on getting you pre-approved before you shop. Specific rate tiers aren't published on their site, so you'll want to reach out directly for a quote based on your credit profile.

• New and used car APR: Competitive local rates; inquire for specifics
• Pre-approval: Dedicated online process
• Membership: Local eligibility for the Sioux Falls area

If you want a lender who'll walk you through the pre-approval process step by step, Siouxland is a solid starting point.

How Sioux Falls Credit Unions Compare to Banks and Online Lenders

Bank rates are estimated based on general trends showing local banks running 0.5% to 1% higher than credit unions, per rate comparison data as of April 2026. Online lender rates reflect national averages for qualified borrowers; check directly for South Dakota-specific offers.

What You'd Save: Sioux Falls Credit Union vs. Bank

Let's make this concrete. Say you're financing a $25,000 used car for 60 months.

Choosing Bluestone FCU over the state average rate saves you roughly $4,320 in interest over the life of the loan. Even compared to a typical local bank, you're keeping about $1,880 in your pocket.

How we calculated this

We used a standard amortizing loan formula: monthly payment equals P times (r divided by 12) divided by (1 minus (1 plus r divided by 12) to the power of negative n), where P is the principal ($25,000), r is the annual interest rate as a decimal, and n is the number of monthly payments (60). Total interest equals (monthly payment times 60) minus $25,000. All figures rounded to the nearest dollar. Rates sourced from lender websites and state data as of April 2026.

How to Join a Sioux Falls Credit Union and Apply for an Auto Loan

1. Check your eligibility. Each credit union has a field of membership. Most Sioux Falls-area CUs accept anyone who lives, works, or worships in the metro area. Confirm on their website before you start.

2. Open a share savings account. This is what makes you a member. It typically requires a deposit of $5 to $25. Think of it as buying a tiny stake in a member-owned cooperative.

3. Pull your credit score. Know where you stand before you apply. Service First FCU, for example, publishes rates for scores from 599 up to 750+. Knowing your tier helps you estimate your rate.

4. Get pre-approved before you shop. Submit your loan application (or a pre-approval request) before visiting dealerships. You'll get a rate and a maximum loan amount. This takes the financing pressure off the showroom floor.

5. Choose your vehicle. With pre-approval in hand, shop with confidence. You already know your budget and your rate.

6. Finalize the loan. Bring your purchase agreement to the credit union (or complete online). They'll verify the vehicle details, finalize your rate, and fund the loan directly to the dealer or seller.

7. Set up autopay. Many credit unions, including Service First FCU, offer a small rate discount for automatic payment enrollment. It's usually 0.25%, which adds up over a 60 or 72-month term.

South Dakota Auto Loan Rate Context

South Dakota sits at rank 31 out of 51 (including D.C.) for auto loan rates, with a state average of 10.94% as of April 2026. That's a middling position nationally, but it doesn't tell the whole story for Sioux Falls borrowers.

The credit unions serving Sioux Falls are running 4.74% to 5.50% on new cars. That's 5 to 6 percentage points below the state average. South Dakota has no strict auto loan APR caps, meaning lenders can charge market rates without a legal ceiling. That makes it even more important to seek out a credit union rather than defaulting to whatever rate a dealership's finance office offers.

The Sioux Falls metro's roughly 200,000 registered vehicles represent a lot of loan decisions being made every year. The borrowers who do their homework and join a local credit union are consistently coming out ahead.

FAQ

Can anyone join a credit union in Sioux Falls?

Most Sioux Falls-area credit unions use a "live, work, or worship" rule for their field of membership. If you live or work in Minnehaha County or the broader Sioux Falls metro, you'll likely qualify for at least one of the credit unions on this list. Check each CU's eligibility page to confirm.

Do credit unions do hard or soft credit pulls?

Pre-qualification checks are typically soft pulls (they don't affect your credit score). A formal loan application triggers a hard pull (which can temporarily lower your score by a few points). If you're rate-shopping multiple lenders, try to submit all applications within a 14-day window. Credit scoring models generally treat multiple auto loan inquiries in that window as a single inquiry.

Can I refinance my current auto loan at a credit union?

Yes. All of the credit unions on this list offer vehicle loan refinancing. If you took out a loan at a dealership or bank and your rate is above 6%, it's worth calling Bluestone FCU or Service First FCU to see if you can refinance into a lower rate. The process is similar to a new loan application.

What credit score do I need for the best credit union rates?

Service First FCU publishes the clearest answer: their best rates (4.90% on new cars for short terms) require a credit score of 750 or higher. Bluestone FCU and Levo advertise 4.74% without publishing a specific score threshold, so contact them directly if your score is below 720. Most credit unions will still work with scores in the 600s, just at higher rate tiers.

Are credit union auto loans available for used cars?

Absolutely. Every credit union on this list finances used vehicles. Service First FCU publishes used car rates starting at 6.30% for top-tier borrowers. Bluestone FCU advertises the same low rate for all model years, new or used. Used car rates are typically 1 to 2 percentage points higher than new car rates across the industry, so factor that in when budgeting.

Sources

• Service First FCU Auto Loans (rates effective December 1, 2025; verified April 2026)
• Bluestone Federal Credit Union Auto Loans (verified April 2026)
• Black Hills Federal Credit Union Vehicle Loans (verified April 2026)
• Siouxland Federal Credit Union Auto Loans (verified April 2026)
• Levo Credit Union (verified April 2026)
• Datatrac Rate Data, Sioux Falls SD (verified April 2026)