HO Scale Trains: The Heart of Model Railroading

HO scale trains have long held the crown as the most popular model train scale in the world. Striking a balance between size, detail, affordability, and accessibility, HO (which stands for “Half O” scale) is the go-to choice for both beginners and seasoned hobbyists alike. In this guide, we’ll explore the history of HO scale, why it’s so widely adopted, who manufactures it, how you can design your own HO layout, and where to find products and communities to fuel your passion.
A Brief History of HO Scale
HO scale emerged in the early 1930s in Europe and gained traction in the United States after World War II. Before HO, O scale dominated, but its large size and cost made it less practical for growing suburban households. HO, at a 1:87 ratio, became the practical middle ground: compact enough for tabletop layouts, yet large enough to showcase intricate detail.
By the 1950s, HO had overtaken O scale as the preferred choice, aided by advances in plastic manufacturing, increased availability, and expanding catalogs from manufacturers like Athearn and Revell.
Why HO Scale Is So Popular
HO scale continues to dominate the model train hobby, and for good reason:
- Perfect Size: HO is large enough to show intricate details in locomotives, rolling stock, and scenery, but small enough to fit on a 4×8 ft layout.
- Vast Selection: Nearly every locomotive, freight car, or passenger train ever built is available in HO.
- Affordable: More competitive manufacturers mean better pricing and frequent deals.
- Thriving Community: HO enjoys a massive support base, clubs, online groups, and conventions.
- Expandable: HO has the widest variety of accessories, track systems, and digital command control (DCC) equipment.

Leading HO Scale Manufacturers
Several well-respected companies specialize in HO scale and have been instrumental in growing the hobby:
- Athearn – A pioneer in HO scale, known for durable and affordable locomotives and cars. Their “Genesis” line offers exceptional realism.
🔗 Visit Athearn - Bachmann Trains – Offers entry-level to mid-range models and is one of the most accessible brands.
🔗 Amazon – Bachmann HO Locomotive
🔗 Visit Bachmann Trains - Walthers – A massive supplier of HO buildings, figures, and rolling stock.
🔗 Amazon – Walthers Cornerstone Series
🔗 Visit Walthers - Kato USA – Though more associated with N scale, Kato also produces high-quality HO locomotives with smooth operation.
🔗 Visit Kato USA - Broadway Limited Imports – Specializes in high-end steam and diesel locomotives, often with sound and DCC out of the box.
🔗 Visit Broadway Limited

HO Scale Layout Potential
One of the greatest advantages of HO scale is its flexibility when it comes to layout design.
Common Layout Sizes:
- 4×8 ft Tabletop: Perfect for beginners, fits in a garage or basement, and allows continuous loop operation.
- Modular Layouts: Many clubs build modular HO layouts using standardized connections.
- Around-the-Room: More advanced setups can follow the room’s perimeter with scenic hills, tunnels, and yards.
Typical Features:
- Rail yards, mountain passes, city scenes, and rural farms
- Realistic turnouts, bridges, viaducts, and trestles
- DCC compatibility for running multiple trains independently
Track Systems:
- Atlas Code 100 & 83
- Kato Unitrack HO
- Peco Streamline
- Bachmann EZ-Track (great for beginners)
🔗 Amazon – Bachmann HO EZ Track Set
Essential HO Scale Accessories
Here are some must-have items to enhance your HO experience:
- Locomotive Starter Sets:
🔗 Amazon – Bachmann HO Train Set - Buildings & Structures:
🔗 Amazon – Walthers Cornerstone Building Kit - Scenery Materials (trees, grass, ballast):
🔗 Amazon – Woodland Scenics Scenery Kit - DCC Controllers:
🔗 Amazon – NCE Power Cab DCC System
HO Scale Communities and Associations
Joining a community can make the hobby even more rewarding:
- National Model Railroad Association (NMRA)
🔗 Visit NMRA - Model Railroader Magazine
🔗 HO Layout Features - HO Scale Facebook Groups and Reddit Threads
- r/modeltrains: Reddit – Model Trains
- Local Train Clubs
Search your area for clubs; many meet monthly and have public operating days.
Final Thoughts
HO scale remains the gold standard in model railroading for a reason. With its perfect blend of detail, accessibility, and community support, it’s the ideal scale for building realistic and expansive layouts whether you’re a newcomer or a veteran railroader. With dozens of resources, quality products, and creative potential, there’s never been a better time to dive into HO.