Best Square Fence Posts of 2025

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Square fence posts are an essential component for constructing a sturdy and long-lasting fence. These posts are made from durable materials such as wood, metal, or concrete, ensuring that they can withstand harsh weather conditions and resist rot and decay. Square fence posts are available in various sizes and materials to suit different fencing needs. They are easy to install and can provide a stable base for attaching fence panels, making them an ideal choice for both residential and commercial fencing.
At a Glance: Our Top Picks
Top 10 Square Fence Posts
Square Wooden Fence Posts 1.8M Pack of 2
The 4wire Fence Posts are sturdy square wooden posts measuring 1.8M by 100MM, perfect for your garden edging needs. These posts are treated and stained, providing added durability and a pleasing aesthetic. Weighing 25KG, they offer excellent stability, ensuring your fencing remains secure and upright. With a rich brown colour, these posts blend seamlessly into your garden, enhancing its overall look while providing the necessary support for your fencing projects.
Pressure Treated Timber Garden Fence Posts
The P Dot Wolf Fence Posts are tanalised and pressure treated, ensuring they last for many years in your garden. Their machine-pointed design makes it easy for you to insert them into the ground, making them ideal for various uses. You can use these sturdy posts for pegging out sites, edging borders, and staking trees. Additionally, they are made from high-quality timber sourced from Sweden, offering extra strength for all your gardening needs.
Square Wooden Fence Post 1.8m Green Treated
The Suregreen Fence Post is a versatile solution for your fencing needs. With a length of 1.8m, it provides ample height for privacy and security in your garden. The dimensions of 50mm x 50mm ensure a sturdy support, making it ideal for various fence designs. Being green pressure treated, this post is designed to resist rot and decay, ensuring long-lasting durability. You can also choose from two lengths, giving you flexibility based on your project requirements.
5ft x 4" Stained Wooden Fence Posts
The Wooden Fence Post is a high-quality option suitable for various fencing needs in your garden or home. Measuring 5ft x 4", these posts are durable and pressure-treated to resist mould, ensuring longevity. Their square edge design makes them ideal for woodworking projects, offering a clean finish for furniture or shelving. Additionally, their versatility allows you to use them in multiple applications, providing convenience and functionality in your outdoor spaces.
Suregreen Square Wooden Fence Post 1.8m
The Suregreen Fence Post is a robust option for your fencing needs. With a length of 1.5 metres, it provides ample support for various fence types. The dimensions of 100mm by 100mm ensure a sturdy base, making it ideal for lasting installations. Being green pressure treated, it offers enhanced durability against weather elements, which means you won’t have to worry about frequent replacements. Additionally, it is available in multiple lengths, giving you the flexibility to choose the perfect size for your project.
Suregreen 2.4m Square Fence Post
The Suregreen Fence Post is a robust option for your fencing needs, featuring large 2.4m posts with a 100mm x 100mm diameter. The green treated tanalised wood ensures extra long life, making it ideal for outdoor use. With its substantial length, it provides excellent stability and support for various types of fencing. The 4"x4" size offers versatility, allowing you to use these posts in a range of fencing applications, giving you peace of mind in your project.
6ft Stained Treated Wooden Fence Posts
The 4wire Fence Posts are sturdy and reliable, standing at 180cm (6ft) tall and featuring a thickness of 75mm (3"). This height is ideal for creating a secure boundary in your garden, ensuring privacy and protection for your outdoor space. The treated wood provides a robust solution, making these posts resistant to the elements, thus enhancing their longevity. Additionally, the attractive stained finish adds an appealing aesthetic to your garden, allowing for a polished and professional look. These posts are perfect for anyone looking to upgrade their fencing with quality materials.
4ft x 4" Stained Treated Wooden Fence Posts
The 4 x 4 Fence Posts are versatile wooden posts measuring 4ft by 4 inches, designed for various fencing needs. They are made from high-quality timber, ensuring they are suitable for most types of fencing while also being useful for several projects around your home and garden. These posts are pressure-treated to resist mould, thus prolonging their lifespan. Their robust square edge design makes them ideal for woodworking projects, providing a durable and attractive finish for furniture, shelving, or garden fencing.
Woodside 3” Steel Fence Post Holders
The Woodside Fence Post Holders come as a pack of 8, ensuring you have enough stakes for your fencing needs. Each holder is designed for 3” fence posts with an internal measurement of 75mm x 75mm, making them versatile for various fencing projects. The ultra-strong powder coated steel construction guarantees durability and rust resistance, providing a long-lasting solution for your garden. Additionally, the pre-drilled holes simplify installation, allowing you to set up your fence quickly and easily.
Pressure-Treated 6ft Wooden Gate or Fence Post
The Premier Garden Supplies Post is a sturdy, pressure-treated wooden post, measuring 6ft in length. Its Tanalith E treatment ensures durability, making it perfect for use as a gate or fence post. You may notice green flecks in the wood initially, but these will fade as the product weathers. It's important to allow the treatment to dry for 6-8 weeks before painting. Additionally, the mixed softwood construction provides strength, ensuring your investment lasts for years to come.
Frequently Asked Questions (FAQs)
1. Should I use round or square fence posts?
Secondly, while square posts have a more stable base than round posts, the latter is more resistant to animal blows. Apart from this, square posts are susceptible to water damage and rot because of its exposed corners. But you will not experience this problem with round posts that have a more contained surface.
2. What size do square posts come in?
Instagram posts can be square, landscape, or vertical. All images will be cropped to a square in the feed. The ideal size for square posts is 1080px by 1080px at a 1:1 aspect ratio.
3. What is stronger a round post or square post?
(2) A square post (like a circular one) actually has equal 2nd moments of area about any axis, and since the corners are further from the center than the middle of each side, it is stronger (but not stiffer) if it is oriented with the rope pulling across the diagonal of the section.
During our square fence post research, we found 306 square fence post products and shortlisted 10 quality products. We collected and analyzed 5,953 customer reviews through our big data system to write the square fence posts list. We found that most customers choose square fence posts with an average price of £54.16.
The square fence posts are available for purchase. We have researched hundreds of brands and picked the top brands of square fence posts, including 4wire, P Dot Wolf, Suregreen, Woodside, Premier Garden Supplies. The seller of top 1 product has received honest feedback from 73 consumers with an average rating of 4.3.

Corey Philips is an electrician and lighting expert. He graduated from the University of Birmingham in 2012 with a Bachelor's degree in electrical and electronics engineering. Corey is a specialist contractor in lights. He sells and installs and recommends lights and lamp sheds, and other lights accessories. Aside from that, Corey is vast in installing and maintaining electrical appliances like air conditioners, water heaters, and the likes.