Need more cargo room without sacrificing cabin comfort? The right roof storage can make road trips, family vacations, and weekend hauls easier.
This roundup of car roof cargo boxes with locks focuses on security, weather resistance, capacity, and everyday usability so you can choose the best fit fast.
Best 10 Car Roof Cargo Boxes with Locks Picks for 2026
Low-Profile Hard Shell Pick
- Dual-side opening for easier access
- Safety key lock for secure storage
- Low-profile, aerodynamic hard shell
Best For: Secure, streamlined roof storage with side access
Rugged Everyday Hauler
- 18 cu ft capacity for bigger trips
- SlideLock system helps secure the lid
- Dual-side access and quick mounting
Best For: Large, secure cargo hauling with simple everyday use
Rear-Access Value Box
- 18 cu ft cargo capacity
- Rear opening keeps access away from traffic
- Key and lock secure contents and rack
Best For: Practical, lockable storage with rear access
Flexible Soft-Shell Choice
- 21 cu ft waterproof storage space
- Includes luggage lock and reinforced straps
- Fits vehicles with or without a roof rack
Best For: Universal, waterproof roof storage with included lock
Compact Locking Carrier
- 9 cu ft hard-shell box
- Dual-side opening
- Safety key lock system
Best For: Compact rooftop storage with secure access from both sides
Heavy-Duty Locking Box
- 11 cu ft capacity
- Lock included for security
- ABS hard shell with aerodynamic shape
Best For: Travelers needing a larger lockable cargo box for cross-bar-equipped vehicles
Waterproof Travel Box
- 11 cu ft waterproof storage
- Secure key lock
- Cross-bar fit with no-tool install
Best For: Wet-weather travel with secure rooftop storage
Soft-Shell Waterproof Rooftop Bag
21 Cu Ft Waterproof Cargo Carrier
- 21 cubic feet of storage in a soft-shell bag
- Includes luggage lock, anti-slip mat, straps, and hooks
- Waterproof 840D PVC with reinforced seams
Best For: Large, weather-ready rooftop storage on almost any vehicle
Locking Hard-Shell Box
11 Cu Ft Universal Rooftop Carrier
- Key lock secures cargo and lid alignment
- 11 cu ft capacity with 110 lb max load
- ABS hard shell with aerodynamic profile
Best For: Cross-bar vehicles needing lockable, rigid rooftop storage
Universal Lockbox Carrier
- Key lock system secures cargo in transit
- Passenger-side opening for easier loading
- UV-protected ABS shell with 110 lb limit
Best For: Travelers who want a lockable hard box with easy access
Low-Profile Hard Shell Pick – INNO Wedge 660 11 cu ft
If you want car roof cargo boxes with locks that stay sleek on the road, the INNO Wedge 660 is built for practical cargo hauling without the bulky look. Its 11 cubic feet of space is sized for luggage, ski gear, and snowboard storage, while the dual-side opening and safety key lock make loading and securing items easier.
Best For: Drivers who want a low-profile hard shell box with lockable access from either side and a quieter, aerodynamic shape.
Pros:
- Dual-side opening makes loading and unloading easier from either side of the vehicle.
- Safety key lock adds secure storage for travel.
- Universal memory mount works with aero bars, square bars, and many factory crossbars.
- Aerodynamic diffuser design is meant to help reduce driving noise.
Cons:
- 11 cubic feet is smaller than larger cargo boxes in this group.
- Hard shell box weighs 42 pounds, so installation may take some effort.
The Wedge 660 is a strong choice if your priority is a lockable roof box that looks streamlined and offers easy side access. It focuses more on efficient design and secure everyday use than maximum volume.
Rugged Everyday Hauler – Thule Force 3 XL US
For shoppers comparing car roof cargo boxes with locks, the Thule Force 3 XL is aimed at daily use with a rugged, streamlined build. Its 18 cubic feet of space, dual-side access, and SlideLock system make it a practical option for hauling gear while keeping operation straightforward.
Best For: Families and active drivers who want a large hard shell cargo box with intuitive mounting and secure locking.
Pros:
- 18 cubic feet of cargo space gives you room for larger loads.
- Dual-side access adds convenience when packing from either side of the vehicle.
- SlideLock system separates locking and opening functions and indicates when the lid is secured.
- Quick mounting system provides a clear click to confirm safe attachment.
Cons:
- Product details list the box at 8 pounds, but it is still a large rooftop cargo carrier.
- Its larger size may be more box than some drivers need for lighter trips.
This model stands out for convenience features that simplify installation and everyday use. If you want a roomy locked cargo box with a polished, durable feel, it fits that brief well.
Rear-Access Value Box – SportRack Vista XL Black
The SportRack Vista XL is a straightforward choice if you want car roof cargo boxes with locks and prefer rear access instead of side opening. With 18 cubic feet of space, tool-free mounting hardware, and a lock to secure both the contents and the box to your rack, it covers the basics well.
Best For: Buyers who want a roomy, rear-opening hard cargo box with simple installation and lockable storage.
Pros:
- 18 cubic feet of capacity suits family trips and larger cargo loads.
- Rear opening keeps access away from traffic.
- Includes key and lock to secure contents and the box to the rack.
- Tool-free mounting hardware makes installation and removal easier.
Cons:
- Rear-opening design is less convenient than dual-side access for some users.
- ABS construction is durable, but the box is not as premium-feeling as higher-end options.
For shoppers focused on value and practical function, this box is an easy-to-understand pick. It does not overcomplicate the feature set, but it still offers the space and lockable security many drivers need.
Flexible Soft-Shell Choice – FIVKLEMNZ 21 cu ft Roof Bag
If you want car roof cargo boxes with locks but need maximum flexibility, this 21 cubic foot roof bag is a soft alternative that still focuses on security. It uses waterproof 840D PVC, reinforced straps, door hooks, an anti-slip mat, and a luggage lock to help keep gear protected on the road.
Best For: Drivers who need a waterproof, universal-fit roof storage solution that works with or without a roof rack.
Pros:
- 21 cubic feet of storage helps free up interior space.
- Includes a luggage lock, reinforced straps, and 6 door hooks for added security.
- Waterproof construction and welded seams are designed to keep luggage dry.
- Fits cars, SUVs, vans, and trucks with or without a roof rack.
Cons:
- Soft-shell design is less rigid than a hard cargo box.
- Requires more strap-and-hook setup than a hard shell carrier.
This is a good fit when you need storage capacity and broad vehicle compatibility more than a hard box. It is especially useful for travelers who want a lock included but do not want to rely on crossbars alone.
Compact Locking Carrier – INNO ROOF Box 320 9 cu ft
If you want car roof cargo boxes with locks in a lower-profile size, the INNO ROOF Box 320 is built for compact, secure storage. Its 9 cu ft capacity, dual-side opening, and Safety key lock system make it a practical choice for drivers who want extra room without adding a bulky rooftop box.
Best For: Drivers who want a compact hard-shell roof box with easy access from either side and a lockable lid.
Pros:
- 9 cu ft capacity in a compact square, low-profile design
- Dual-side opening for easier loading and access
- Safety key lock system for secure storage
- Memory Mount System is designed for simple installation and use
Cons:
- Smaller capacity than larger rooftop cargo boxes
- Made for vehicles with compatible aero or square bars only
This box makes the most sense for shoppers who value secure, straightforward rooftop storage over maximum volume. Its compact footprint and locking hard shell are the main selling points, especially for everyday travel and lighter packing needs.
Heavy-Duty Locking Box – 11 Cu Ft Rooftop Carrier
Among car roof cargo boxes with locks, this 11 cubic foot carrier is aimed at drivers who need a larger hard-shell storage solution for road trips and gear hauling. It uses ABS plastic construction, a lockable lid, and a universal fit design for vehicles with factory or aftermarket cross bars.
Best For: Families and travelers who want a roomy, lockable rooftop cargo box with weather-resistant hard-shell storage.
Pros:
- 11 cu ft of storage with 110 lb maximum evenly distributed capacity
- Security lock included to help secure valuables and lid alignment
- Hard ABS shell is designed for weather resistance and durability
- Aerodynamic shape helps reduce wind noise and fuel use
Cons:
- Requires factory or aftermarket cross bars
- Best fit depends on verifying roof type and cross bar width first
This is a strong pick if you want more room than a compact cargo box and prefer a simple lock-and-load setup. It balances capacity, weather protection, and broad vehicle compatibility in a practical rooftop carrier format.
Waterproof Travel Box – Hard Shell 11 Cu Ft Carrier
If you need car roof cargo boxes with locks for wet or rough weather, this hard-shell rooftop carrier focuses on protection and straightforward use. It fits vehicles with cross bars only, offers 11 cubic feet of space, and includes a secure key lock for added peace of mind.
Best For: Drivers who want a waterproof, lockable roof box with a simple universal cross-bar setup.
Pros:
- 11 cu ft of storage with 110 lb load capacity
- Waterproof hard shell made from durable ABS plastic
- Secure key lock for easier storage safety
- No-tool assembly and installation is noted in the product details
Cons:
- Fits vehicles with cross bars only
- Bulky size may be more than some drivers need
This box stands out for shoppers who want weather protection first and secure storage second. Its waterproof hard shell and locking design make it a sensible option for trips where luggage may face rain, dirt, or freezing conditions.
Soft-Shell Waterproof Rooftop Bag – 21 Cu Ft Waterproof Cargo Carrier
If you want car roof cargo boxes with locks but need a softer, more flexible option, this 21-cubic-foot rooftop cargo bag is built for big trips and mixed vehicle compatibility. It uses heavy-duty 840D PVC, waterproof zipper flaps, and reinforced seams to help keep luggage protected in rough weather, while the included anti-slip mat, straps, door hooks, and luggage lock make setup more secure.
Best For: Families, road trips, and drivers who need large rooftop storage on vehicles with or without roof racks.
Pros:
- Large 21 cu ft capacity for luggage, tents, blankets, and sleeping bags
- 100% waterproof design with sealed zipper flap and reinforced seams
- Includes anti-slip mat, 6 door hooks, extra straps, and a luggage lock
- Works on vehicles with or without roof racks
Cons:
- Soft-shell design is less rigid than a hard cargo box
- Requires proper strap and hook installation for the most secure fit
- Best suited to cargo that can be packed into a bag format
This is a practical choice if your priority is maximum space, weather protection, and broad vehicle compatibility rather than a fixed hard case. The lock adds a useful security touch, but the bag format still favors flexible packing over rigid organization.
Locking Hard-Shell Box – 11 Cu Ft Universal Rooftop Carrier
Among car roof cargo boxes with locks, this hard-shell carrier is a straightforward option for drivers who want a secure, weather-resistant storage box for cross-bar-equipped vehicles. It offers 11 cubic feet of space, a 110 lb evenly distributed load rating, and an ABS shell designed to handle UV rays, road debris, and everyday travel.
Best For: SUV, truck, sedan, crossover, or EV owners with factory or aftermarket cross bars who want lockable rooftop storage.
Pros:
- Lockable lid with key for added cargo security
- 11 cu ft capacity and 110 lb max load when evenly distributed
- Rugged ABS hard shell for weather and road-debris protection
- Aerodynamic shape helps reduce wind noise and fuel use
Cons:
- Requires factory or aftermarket cross bars to mount
- Not water resistant per the supplied details
- Smaller than some soft cargo bags in total volume
This box makes sense if security and a rigid shell matter more than maximum capacity. Its lockable design and hard exterior are the main advantages, especially for longer trips where you want a more permanent-feeling rooftop carrier.
Universal Lockbox Carrier – 11 Cu Ft Hard Shell Roof Box
If you are comparing car roof cargo boxes with locks, this universal hard-shell roof box keeps the focus on secure storage and simple loading. It provides 11 cubic feet of space, a 110 lb capacity, a passenger-side opening, and a key lock system that keeps the lid secured once all lock points are set.
Best For: Drivers who want a universal-fit hard cargo box with secure locking and easy passenger-side access.
Pros:
- Key lock system helps keep valuables secure during travel
- 11 cu ft capacity with up to 110 lb load rating
- Passenger-side opening makes loading and unloading easier
- UV-protected, weather-resistant ABS shell for durability
Cons:
- Fits max 13-inch-wide cross bars, so compatibility must be checked
- Hard-shell capacity is smaller than larger soft bags
- Mounted roof box adds bulk even when not fully loaded
This is a solid pick for travelers who value a lockable, weather-resistant box and want easier side access when packing. Its universal design is helpful, but it is still important to verify cross-bar width before buying.
How We Picked the Best Car Roof Cargo Boxes with Locks
We focused on storage capacity, locking security, build quality, weather protection, mounting simplicity, and real-world compatibility. Because shoppers compare both hard-shell and soft-sided options, we included a mix of styles while prioritizing secure, durable choices for travel.
Quick Comparison
Among Car Roof Cargo Boxes with Locks, hard-shell models generally offer better security and easier access, while soft cargo bags are lighter, more affordable, and easier to store when not in use. If you travel often or carry valuable gear, a lockable hard box is usually the better long-term buy.
Key Buying Factors for Car Roof Cargo Boxes with Locks
Capacity and Shape
Choose a size that matches your typical load, not just your occasional biggest trip. Low-profile boxes can reduce wind resistance and garage clearance issues, while taller designs may offer more usable volume for bulky bags.
Locking and Access
Look for integrated locks, sturdy latching hardware, and easy access from one or both sides. Dual-side opening can be especially convenient when loading in tight parking spaces.
Roof Compatibility
Make sure the box works with your vehicle’s roof setup, whether you have crossbars, factory rails, or a bare roof requiring specific mounting hardware. Confirm weight limits for both the box and your roof system.
Weather Protection and Durability
Hard shells usually provide stronger protection from rain, road grime, and impact. For soft carriers, check for waterproof material, reinforced seams, and secure anti-slip straps.
Ease of Installation
A good roof cargo box should mount securely without turning setup into a chore. If you plan to remove it often, consider weight, handle placement, and whether the mounting system is tool-free or simplified.
Who Should Buy Which Car Roof Cargo Boxes with Locks?
If security and all-weather protection matter most, choose one of the hard-shell Car Roof Cargo Boxes with Locks. If you need maximum flexibility, lower cost, or occasional-use storage, a roof bag can still be a practical solution. Frequent travelers should lean toward durable hard-shell designs, while occasional vacation users may prefer a lighter, easier-to-store option.