10 Best Car Roof Cargo Boxes With Locks for 2026

Need more secure cargo space for your next trip? The best car roof cargo boxes with locks add weather protection, theft deterrence, and extra room without crowding the cabin.

Below, we’ve rounded up 10 options that prioritize capacity, ease of loading, and fit, so you can choose a box that matches your vehicle and travel style.

Best 10 Car Roof Cargo Boxes with Locks Picks for 2026

Premium Family Hauler – Yakima SkyBox NX 18 XLG

If you want one of the more versatile car roof cargo boxes with locks for larger trips, the Yakima SkyBox NX 18 XLG gives you 18 cubic feet of secure storage and room for gear like skis up to 195 cm. The dual-sided opening makes loading easier from either side of the vehicle, while the metal handle and SKS lock system help keep everything secured on the road.

Best For: Campers, ski trips, and families needing maximum secure rooftop storage with easy dual-side access.

Pros:

• 18 cubic feet of cargo space for up to 4 campers
• Dual-sided opening for easier access during loading and unloading
• SKS locking system secures gear inside the box and the box to the vehicle
• Unobstructed flattened floor helps maximize usable packing space

Cons:

• Not water resistant, so weather exposure is a consideration
• Large size may be more box than solo travelers need

Overall, this is a strong choice if storage capacity and convenience matter most. It combines a sleek hard-shell build with practical access and security features for frequent travel.

Rugged Daily-Use Pick – Thule Force 3 XL US

The Thule Force 3 XL US is built for shoppers comparing car roof cargo boxes with locks and wanting a durable, easy-to-use option for regular hauling. It offers 18 cubic feet of space, access from both sides, and a quick mounting system that clicks when the box is safely attached, making it a practical fit for active lifestyles.

Best For: Drivers who want a durable rooftop cargo box with intuitive mounting and dual-side access for frequent use.

Pros:

• 18 cubic feet of storage with a sleek, rugged design
• Quick mounting system with a simple safety click indicator
• Dual-side access makes loading and unloading easier
• SlideLock system separates locking and opening for secure closure

Cons:

• No weight capacity is listed in the supplied details
• Dimensions are large, so fit should be checked carefully

This box stands out for straightforward usability and road-tested durability. If you want a premium cargo carrier that emphasizes secure mounting and daily convenience, it is an easy one to shortlist.

Budget-Friendly Access – SportRack Vista XL

The SportRack Vista XL is a practical pick if you want car roof cargo boxes with locks and prefer rear access away from traffic. With 18 cubic feet of space, tool-free mounting hardware, and compatibility with many rack styles, it focuses on simple installation and broad usability.

Best For: Drivers who want easy rear access and straightforward installation on many common roof rack setups.

Pros:

• 18 cubic feet of internal cargo capacity
• Rear opening keeps access away from traffic
• Tool-free mounting hardware simplifies installation and removal
• Includes key and lock for securing contents and the box to the rack

Cons:

• Lower max weight capacity than some larger premium boxes
• Rear-opening design may not suit every parking setup

For buyers who value convenience and compatibility, this box covers the basics well. It is a strong utility-first option for common travel and weekend cargo needs.

Compact Secure Carrier – Auto Dynasty Hard Shell Roof Box

If you need a smaller option among car roof cargo boxes with locks, the Auto Dynasty hard shell cargo carrier offers 11 cubic feet of storage in a compact footprint. It uses a key lock system, passenger-side opening, and tool-free mounting brackets, which makes it a practical choice for lighter travel loads and smaller vehicles.

Best For: Smaller trips, lighter cargo, and drivers who want a compact locked rooftop box with easy passenger-side access.

Pros:

• 11 cubic feet of storage with a 110 lb weight limit
• Key lock system helps secure valuables during travel
• Passenger-side opening supports easier loading and unloading
• Tool-free mounting brackets included for installation

Cons:

• Smaller capacity than the 18 cu ft competitors in this roundup
• Universal fit still depends on checking crossbar width before purchase

This is the most compact option here, which can be an advantage if you do not need a giant box. It is best viewed as a secure, weather-resistant cargo solution for moderate packing needs rather than maximum-volume hauling.

Premium Locking XXL Box – Yakima CBX XXL Rooftop Cargo Gear Box

If you want car roof cargo boxes with locks that feel built for serious travel, the Yakima CBX XXL is a strong fit. Its 21.5-cubic-foot capacity, dual-sided access, and SKS locking system make it a practical option for hauling lots of gear while keeping access and security simple.

Best For: Families and road-trippers who need maximum rooftop storage, secure locking, and easy access from either side.

Pros:

• 21.5 cubic feet of storage with room for gear for up to 5 travelers
• Dual-sided opening makes loading and unloading easier at either side of the vehicle
• Intuitive lid handle locks both the box and your equipment, with SKS locks included
• Universal mounting hardware supports Yakima StreamLine and many factory or aerodynamic crossbars

Cons:

• Large size may be more box than solo travelers or light packers need
• Supplied notes list it as not water resistant, so that matters if you expect heavy exposure
• Best suited to crossbars that match the stated mounting compatibility

Overall, this is the most security- and access-focused option in the group, with capacity to spare for skis, snowboards, camping gear, and family luggage. If your priority is a premium locked cargo box with a roomy interior, it stands out.

Budget Waterproof Lock Box – Hard Shell Roof Top Cargo Carrier

This hard-shell option is a straightforward choice if you need car roof cargo boxes with locks without a complicated setup. It uses a secure key lock, waterproof construction, and a universal fit for vehicles with cross bars only, making it a practical storage add-on for everyday luggage.

Best For: Drivers who want a simple waterproof rooftop box with key-lock security and a moderate 11-cubic-foot capacity.

Pros:

• Secure key lock adds peace of mind when storing luggage
• Waterproof ABS plastic construction helps protect contents from weather
• Universal fit for vehicles with cross bars only
• 11 cubic feet of storage in a 53 x 34 x 15 inch hard shell box

Cons:

• Smaller capacity than larger rooftop cargo boxes in the lineup
• Mounts only to vehicles with cross bars
• Notes do not mention dual-sided opening

For shoppers focused on value and basic locked rooftop storage, this box covers the essentials well. It is a practical pick if you want a weather-resistant cargo box that adds space without taking over the vehicle.

Dual-Access Mid-Size Box – 14 Cubic Feet Rooftop Cargo Box

If you want car roof cargo boxes with locks in a mid-size shape, this 14-cubic-foot rooftop box is built around practical everyday use. It offers dual-side opening, two lock keys, and strong mechanical arms, which makes it a convenient option when you need extra space and easier loading from either side.

Best For: Travelers who want a mid-size rooftop cargo box with dual-side access and simple lock-key security.

Pros:

• 14 cubic feet of extra storage for luggage and gear
• Opens from both sides for more convenient access
• Includes 2 lock keys for basic secure closure
• Strong mechanical arms help keep the box open until closed

Cons:

• Installation instructions are not included
• Professional installation is recommended in the notes
• Plastic construction may not feel as premium as higher-end boxes

This is a balanced pick if you want more space than a compact box but do not need an oversized carrier. The dual-opening design and included lock keys make it a user-friendly choice for general travel storage.

Travel-ready security – Goplus 14 Cu Ft Hard Shell Roof Cargo Box

If you want car roof cargo boxes with locks that add real storage without cutting into cabin space, this Goplus hard shell box is built for road trips, beach days, and everyday gear hauling. It offers 14 cubic feet of storage, a waterproof hard shell, and dual-side opening for easier loading and unloading.

Best For: Drivers who need a lockable, waterproof rooftop box with good capacity and easy side access.

Pros:

• 14 cubic feet of storage helps free up room inside the vehicle.
• Double-lock design and super latch security help protect valuables.
• Dual-sided opening makes access more convenient from either side.
• Waterproof ABS/PC construction is made for varied weather conditions.

Cons:

• Requires compatible crossbars, including width and thickness limits.
• Notes say not to open both sides at the same time.
• At 25 pounds, it may still take some effort to mount.

Overall, this Goplus option is a practical pick if you want a roomy lockable cargo box with simple access and weather protection. Its fit requirements are specific, but the security features and solid capacity make it a strong travel-focused choice.

Dual-lock storage – WFLNHB 14 Cu Ft Dual-Lock Rooftop Box

Among car roof cargo boxes with locks, this WFLNHB model stands out for its 14 cubic feet capacity, dual safety locks, and dual-side opening design. It is made from ABS material and is meant to give you extra rooftop storage while keeping valuables secured during travel.

Best For: Drivers who want a simple hard-shell cargo box with locking security and access from both sides.

Pros:

• 14 cubic feet of storage provides useful extra cargo space.
• Dual safety locks and two keys add security for stored items.
• Dual-side opening makes loading and unloading easier.
• ABS construction is designed for stability and durability.

Cons:

• Dimensions may be larger than some buyers expect, so fit should be checked carefully.
• No detailed weight or load-capacity specs were provided in the notes.
• Opening both sides at once is specifically discouraged.

This WFLNHB box is a straightforward option if you want locked rooftop storage without a complicated feature set. The security details are clear, and the dual-side access makes it easy to live with on longer trips.

Balanced everyday pick – TUFFIOM 13.4 cu.ft. Dual-Side Roof Box

If you are comparing car roof cargo boxes with locks and want a slightly smaller but still practical option, this TUFFIOM rooftop box offers 13.4 cubic feet of storage, dual-side opening, and locks on both sides. Its streamlined shape is meant to reduce drag and noise while helping protect luggage from sun, rain, and dust.

Best For: SUV, car, or van owners who want a lighter hard-shell box with locking security and weather protection.

Pros:

• 13.4 cubic feet of storage adds meaningful space for travel gear.
• Locks on both sides with keys help secure valuables.
• Dual-side opening improves access from driver or passenger side.
• ABS shell and waterproof design help protect items from weather.

Cons:

• Maximum load capacity is lower than some larger boxes at 150 lbs.
• Requires crossbars that fit the stated width and hole-spacing limits.
• The lid has protective film that must be removed before use.

For shoppers who want a balanced mix of capacity, security, and easier handling, this TUFFIOM box is a solid fit. The 3-year warranty and lower weight make it especially appealing for frequent trip use.

How We Picked These Car Roof Cargo Boxes with Locks

We focused on practical features buyers use most: usable capacity, lock type, opening style, shell strength, weather resistance, and overall dimensions. We also considered whether the box is easier to load from the side or rear, since access can matter as much as raw size.

Because roof space is limited, we favored models that make it easier to secure luggage, camping gear, and bulky items without sacrificing stability or convenience.

Quick Comparison

Large premium boxes are best for families, long trips, and mixed gear loads. Mid-size options usually offer the best balance of price, footprint, and versatility. Smaller boxes make sense if you only need extra room a few times a year or want to keep rooftop weight and drag lower.

Key Buying Factors for Car Roof Cargo Boxes with Locks

Capacity and Dimensions

Don’t shop by cubic feet alone. Check the box length and width against your roof rack spacing and the items you plan to carry. Long skis, strollers, or suitcases may need a larger footprint than the listed volume suggests.

Opening Style

Dual-side opening is usually the most convenient because it lets you access cargo from either side of the vehicle. Rear-opening boxes can work well in tight parking spaces, while side access is often easier for family travel.

Locking System

Locks on Car Roof Cargo Boxes with Locks should secure the lid firmly and be simple to operate with gloves or in poor weather. Look for designs that close evenly and indicate when the box is fully latched.

Durability and Weather Protection

Hard shells made from ABS or similar materials tend to resist impact better than softer solutions. A weather-tight lid and solid hinges help protect luggage from rain, dust, and road spray, though no rooftop box should be treated as fully submersible.

Weight, Mounting, and Vehicle Fit

Make sure your roof rack and vehicle roof load limit can support the box plus cargo. A lighter box is easier to install, but a sturdier one may better handle repeated use and highway miles.

Who Should Buy Which Car Roof Cargo Boxes with Locks?

Choose a larger box if you travel with multiple passengers, bulky luggage, or outdoor gear. Pick a mid-size model if you want a more flexible everyday solution with less wind drag. Go smaller if you only need occasional overflow storage or have a shorter vehicle where roof length is limited.

If convenience matters most, prioritize dual-side access. If security and peace of mind matter most, look closely at the latch quality, lock design, and how tightly the lid seals before you buy.