HO Scale Manufacturers

Accu-Cals by SMP Industries
Water Slide Decals
Alloy Forms
White Metal Details and Autos
A.W. Enterprises / Rix Products
Building Kits and parts (Now sold by Rix Products under Smalltown USA)
Broadway Limited
Locomotives with Sound and DCC, Freight & Passenger Cars
Caboose Industries
Ground throws and switchstands
Campbell Scale Models
Wood Craftsman Structure Kits and Plastic Details
Champion Decals
Waterslide decals
Chooch Enterprises
Polyurethane portals, retaining walls, etc.
Design Preservation Models
Plastic Building Kits and Wall Sections
Durango Press
Building and Railroad Car Kits
E & B Valley Railroad
Plastic Craftsman Passenger and Freight Car Kits
Ertl Collectibles
Plastic RTR freight cars and loads
Intermountain Railway Company
Plastic Freight Car Kits and Accessories
Mantua Metal Products
Die Cast Metal Steam Locomotive Kits and RTR, Plastic RTR Diesels
Microscale Decals
Waterslide decals
Microscale Mini-Cals
Waterslide decals
Model Die Casting
Roundhouse Brand Die Cast Metal Locomotive Kits and Plastic Freight Car Kits
Model Die Casting - Parts
Roundhouse Brand Module and Other Parts
Pola
Plastic Structure Kits
Preiser
Figures
Red Caboose
Plastic Freight Car Kits and Accessories
Rivarossi
Plastic Locomotives and Passenger Cars (some in IHC boxes from when they were distributor)
Scale Structures Limited
Structures and Detail Parts
Stewart Hobbies
Plastic Freight Car Kits and Locomotive Kits and RTR
Tichy Train Group / Creative Model Associates
Plastic Freight Car and Structure Kits and Detail Parts
Westerfield
Resin Craftsman Freight Car Kits
Wheel Works (Div of Micro Engineering)
Cast Metal Vehicle Kits
Woodland Scenics
Scenery products and figures