Cerro Gordo County at a Glance
Cerro Gordo County was formed in 1851 as part of Iowa’s westward wave of county creation, and named for the Battle of Cerro Gordo, the April 1847 clash in the Mexican-American War where General Winfield Scott’s forces defeated General Santa Anna. The county wasn’t organized with its own functioning government right away — that came later, with the first county elections held on August 7, 1855, and the first term of court convened in Mason City in 1857. Mason City, originally platted as Masonic Grove, has served as the county seat ever since. Cerro Gordo County covers 575 square miles — 568 square miles of land and roughly 6.8 square miles of water — and is bordered by six neighboring counties: Worth to the north, Floyd to the east, Butler to the southeast, Franklin to the south, Wright to the southwest, and Hancock to the west.
The county’s 2020 Census population was 43,127, and the U.S. Census Bureau’s most recent vintage estimate (July 1, 2025) puts it at 42,372 — a modest decline of under 2% over five years, not the fast growth story of Iowa’s biggest metro counties, but a stable, established North Iowa market all the same. Mason City anchors the county with 27,338 residents (2020 Census) and is home to North Iowa Area Community College, the Music Man Square attraction honoring native son Meredith Willson, and a genuine industrial and healthcare employment base. Nine miles northeast, Clear Lake sits directly on the shore of Clear Lake itself, Iowa’s fifth-largest natural lake, with 7,687 residents and a lake-tourism economy built around it — including the Surf Ballroom, a still-operating music venue that opened in 1933, was rebuilt at its current location in 1948 after a fire, and has been a National Historic Landmark since 2021 and a Rock and Roll Hall of Fame Historic Landmark since 2009. The Surf is also the site connected to February 3, 1959 — “The Day the Music Died” — when Buddy Holly, Ritchie Valens, and J.P. “The Big Bopper” Richardson died in a plane crash shortly after taking off from the nearby Mason City airport following their final performance there. Between Mason City’s scale and Clear Lake’s tourism draw, this page exists to give both cities’ real detail a single countywide home.
Cities We Serve in Cerro Gordo County
Both of Cerro Gordo County’s largest cities already have their own dedicated SolQ page with local pricing, utility, and permitting detail. Tap a city below for the full picture, or keep reading — this page covers the countywide overview and the smaller communities in between.
Mason City · pop. 27,338 · county seat
Cerro Gordo County’s largest city, home to North Iowa Area Community College and Music Man Square. Squarely inside Alliant Energy territory, with 40 completed SolQ installs on record.
View Mason City Page →Clear Lake · pop. 7,687 · on Clear Lake itself
A lakeshore community and genuine North Iowa tourist destination, home to the historic Surf Ballroom. 100% of SolQ’s 11 completed Clear Lake installs run through Alliant Energy.
View Clear Lake Page →Also Serving Cerro Gordo County’s Smaller Communities
Cerro Gordo County is home to a number of smaller incorporated towns that don’t (yet) have their own dedicated SolQ page — including Rockwell, Ventura, Thornton, Rock Falls, Swaledale, Meservey, and Dougherty — plus the rural townships that surround Mason City and Clear Lake. We don’t have completed installs on record in these smaller communities specifically, and we say so directly rather than implying otherwise. If you live in one of these towns, or anywhere else in the county, the FAQ below explains how coverage and utility service work for you.
Electric Utilities Serving Cerro Gordo County
Alliant Energy is the dominant electric provider across Cerro Gordo County, and it’s effectively the only one inside Mason City and Clear Lake themselves — every one of our 51 completed installs across both cities runs through Alliant. But the county as a whole isn’t single-utility, and we say so plainly for anyone living outside those two cities.
Alliant Energy
The dominant provider countywide, with an estimated 23,039 Cerro Gordo County customers per findenergy.com — roughly 91% of the county’s estimated 25,292 total electric customers across all four providers. Alliant serves Mason City and Clear Lake in full, per both cities’ own project records. Solar production is credited under Alliant’s Rate IO (inflow/outflow) tariff, or Rate NM (net metering) for customers who still qualify. Full detail on our dedicated Alliant Energy solar page.
MidAmerican Energy
An estimated 1,724 Cerro Gordo County customers per findenergy.com, concentrated primarily around Rockwell and the surrounding southeastern part of the county, outside Mason City and Clear Lake proper. MidAmerican runs its own separate net-metering and interconnection rules, distinct from Alliant’s tariffs.
Franklin Rural Electric Cooperative
A member-owned rural electric cooperative with an estimated 423 Cerro Gordo County customers per findenergy.com, reaching farms and rural accounts primarily near Rockwell and the county’s southern edge along the Franklin County line. Co-op interconnection and crediting rules differ from an investor-owned utility like Alliant.
Prairie Energy
The smallest of Cerro Gordo County’s four providers, with an estimated 106 customers per findenergy.com, reaching a limited number of rural accounts. If your address is near any county-line boundary, SolQ confirms your exact provider and crediting terms before you sign anything.
Customer counts above come from findenergy.com’s county-level utility data, current as of this page’s publication. For Mason City and Clear Lake specifically, both cities’ own project records confirm 100% Alliant Energy service; for smaller unincorporated areas and townships near the county’s edges, SolQ confirms which of the four providers actually serves your home before designing your system.
Real SolQ Installs in Cerro Gordo County
Cerro Gordo County has a real, verified proof base behind it: 51 completed residential installs across Mason City and Clear Lake, totaling 462 kW installed. In Mason City, our project records show 40 completed installs on system sizes ranging 3.7–17.6 kW (median 7.7 kW, 356 kW total), on streets including Jade Court (17.6 kW), 15th Street Southeast (12.9 kW), Morning Star Court (9.8 kW), and North Willowgreen Court (7.4 kW), alongside 2nd Street Northwest and 20th Street Southwest. In Clear Lake, we’ve completed 11 installs on system sizes ranging 5.5–15.4 kW (median 8.5 kW, 106 kW total), on streets including Rylea Drive (15.4 kW), Hickory Avenue (12.0 kW), Stenberg Dr (10.4 kW), Pine Brook Drive (8.5 kW), Main Avenue (6.8 kW), and N 4th St (5.5 kW) — every one of them connected through Alliant Energy. Recent installs in both cities have gone up with Axitec 400W Black, Vsun 370W Black, and Philadelphia 440W Black panels, sourced through distributor CED Greentech like everything else we install. We don’t yet have a completed install on record specifically inside Rockwell, Ventura, or any of the county’s other smaller towns, and we say so directly rather than padding the number — what backs every Cerro Gordo County project regardless is the same crew, permitting relationships, and equipment lineup behind our 1,179 completed installs statewide.
Why Cerro Gordo County Homeowners Choose SolQ
Two Cities, One Point of Contact
Mason City and Clear Lake each have their own live SolQ city page with local pricing, permitting, and utility detail, plus this countywide page to tie them together for smaller Cerro Gordo County communities.
Utility-Aware, Not Utility-Guessing
Alliant Energy runs Mason City and Clear Lake, but MidAmerican Energy, Franklin Rural Electric Cooperative, and Prairie Energy all reach parts of the wider county. We confirm which one serves your exact address before designing your system.
Real North Iowa Track Record
51 completed installs across Mason City and Clear Lake, 1,179 completed Iowa installs and counting, a 4.8-star Google rating across 413 reviews, an A+ BBB rating, and EnergySage’s 2026 Local Installer of the Year award.
Iowa Solar Tax Benefits
Iowa’s state income-tax credit for residential solar isn’t available for systems installed after 2021. Here’s what Cerro Gordo County homeowners can actually count on today.
5-Year Property-Tax Exemption
The added home value from your solar system is exempt from property tax assessment for five years after installation.
Sales-Tax Exemption
Qualifying solar equipment is exempt from Iowa sales tax. Labor is still taxable, so we break out real numbers up front.
Utility-Specific Crediting
Alliant’s Rate IO / Rate NM tariffs credit solar exports differently than MidAmerican’s or the co-ops’ rules elsewhere in the county — we confirm which applies to your exact address.
Cerro Gordo County Solar FAQ
Does SolQ serve all of Cerro Gordo County, or just Mason City and Clear Lake?
All of it. Mason City and Clear Lake are our most established Cerro Gordo County markets, but SolQ installs residential solar throughout the county, including smaller communities like Rockwell, Ventura, Thornton, and Rock Falls. This page exists specifically to cover the whole county in one place, not just the two biggest cities.
What if my town isn’t listed here by name?
If you live anywhere inside Cerro Gordo County’s borders, we almost certainly serve you. We don’t yet have a completed install on record in every small township or town, and we say so directly rather than implying otherwise. Reach out and we’ll confirm coverage, utility, and crediting terms for your specific address before you commit to anything.
Does SolQ have dedicated pages for Mason City and Clear Lake?
Yes – Mason City and Clear Lake both have their own dedicated SolQ pages with city-specific pricing, utility, and permitting detail. This county page is the place to start if you’re not sure which city page applies to you, or if you live in one of the smaller communities.
What electric utility serves my home in Cerro Gordo County?
Alliant Energy serves Mason City and Clear Lake in full, and is the dominant utility countywide with an estimated 23,039 customers, roughly 91% of the county’s electric customer base per findenergy.com. MidAmerican Energy and Franklin Rural Electric Cooperative reach parts of the county outside those two cities, primarily around Rockwell, and Prairie Energy serves a small number of additional rural accounts. We confirm your exact provider before designing your system.
How does Alliant Energy credit my solar production?
Alliant credits solar production one of two ways depending on your account: its standard inflow-outflow tariff (Rate IO), which values energy you send to the grid separately from what you use, or – for customers who still qualify – a net-metering pilot tariff (Rate NM) that offers a more favorable 1:1 credit. We check which one applies to your account before you sign anything. Full detail is on our dedicated Alliant Energy solar page.
What about MidAmerican Energy, Franklin Rural Electric Cooperative, and Prairie Energy?
All three are real providers with a genuine, if smaller, footprint in Cerro Gordo County outside Mason City and Clear Lake. Per findenergy.com, MidAmerican serves an estimated 1,724 county customers and Franklin Rural Electric Cooperative about 423, both concentrated primarily around Rockwell and the county’s southeastern edge, while Prairie Energy reaches roughly 106 additional rural accounts. Each runs its own separate interconnection and crediting rules, distinct from Alliant’s tariffs. We confirm which provider serves your specific address before designing anything.
Is Iowa’s state solar tax credit still available?
No. Iowa’s state income-tax credit for residential solar isn’t available for systems installed after 2021. Two state benefits still apply regardless: a 5-year property-tax exemption on the added home value from your system, and a sales-tax exemption on qualifying solar equipment (labor is still taxable).
What about the federal solar tax credit?
If you’re buying your system outright through cash or a loan, the federal Residential Clean Energy Credit (Section 25D) ended for systems placed in service after December 31, 2025, under the One Big Beautiful Bill Act signed in July 2025. If you go with a Lease or PPA instead, the benefit is still built in indirectly: our financing partner owns the system and claims a separate federal credit for commercial-owned solar (Section 48E, active for projects that begin construction by July 4, 2026, or are placed in service by December 31, 2027), which is part of how they can offer $0-down payments below what you’re currently paying your utility. We’ll walk you through exactly what applies to you during your free consultation.
Are there Cerro Gordo County-specific permitting requirements?
Yes, and they vary by municipality. Mason City and Clear Lake each run their own permitting process, separate from Cerro Gordo County’s own rules for unincorporated areas and smaller towns. We handle the paperwork with your specific city or the county, and file the interconnection application with your utility, so you don’t have to sort out which office to call.
How long does a Cerro Gordo County solar installation take, start to finish?
Many projects are installed in as soon as 30 days. Some take longer, up to 2-3 months, depending on your municipality’s permitting timeline and your utility’s interconnection queue. We give you a realistic timeline for your specific address up front.
Has SolQ actually completed solar installs in Cerro Gordo County?
Yes. 40 completed residential installs in Mason City and 11 in Clear Lake, 51 total across the county, totaling 462 kW installed, every one of them connected through Alliant Energy. We don’t yet have a completed install specifically inside Rockwell, Ventura, or the county’s other smaller towns, and we say so directly rather than implying otherwise.
Why is Clear Lake a unique solar market in Cerro Gordo County?
Clear Lake sits directly on the shore of Clear Lake, Iowa’s fifth-largest natural lake, and is a genuine North Iowa tourist destination built around it. The town is also home to the Surf Ballroom, a still-operating music venue that opened in 1933 and has been a National Historic Landmark since 2021, best known as the site of the final performance by Buddy Holly, Ritchie Valens, and J.P. “The Big Bopper” Richardson before their February 3, 1959 plane crash. That mix of lakeshore seasonal homes and full-time residential neighborhoods is exactly why our Clear Lake install base is 100% Alliant Energy, with no split utility territory to navigate.
How does snow affect solar production in a North Iowa winter?
Cerro Gordo County sees real winter weather, and panels are engineered for that seasonal range: steep-mount racking sheds snow faster than a roof’s own pitch, and panels typically clear themselves within a day or two of a storm as they warm in the sun. Production dips in December and January and climbs sharply in spring and summer, which your system design accounts for from the start.
Built for Cerro Gordo County
Whether you’re in Mason City, on the shores of Clear Lake, or a smaller Cerro Gordo County town like Rockwell or Ventura, SolQ designs your system around your actual roof, your actual utility, and Iowa’s actual winters — not a generic template.
Get My Free Solar AnalysisSolQ is an independent solar provider and is not affiliated with Alliant Energy, MidAmerican Energy, Franklin Rural Electric Cooperative, Prairie Energy, the Surf Ballroom, or any government agency. Savings figures shown are estimates, not guarantees. Financing offered through third-party partners; terms subject to partner approval. Tax exemptions subject to Iowa law; consult a tax professional for your specific situation. Verified as of August 2026.