Have you ever looked at the back seat of your car after a weekend road trip and wondered how so many snack wrappers managed to set up a permanent residence?
Whether you are tackling daily school runs, heading out on a beach getaway, or just trying to keep your commute clutter-free, this handy Car Hanging Trash Bag is about to become your ultimate travel companion!
Crafted with a breathable, stretchy stitch pattern, this versatile pouch easily holds a standard plastic shopping bag liner for quick waste disposal, but it works just as amazingly as a backseat toy organizer, road trip snack tote, or portable yarn project bag.
Materials and Preparation
Materials:
- Yarn: Approximately 5.5 oz (155 g) of medium weight #4 cotton yarn. (Scrap-friendly project! Feel free to mix matching shades of cotton yarns from your stash or work with a single color.)
- Liner (Optional): Standard plastic grocery bag (e.g., Walmart plastic bag) to use as a removable trash liner.
Tools:
- Crochet Hook: Size I / 5.5 mm crochet hook.
- Yarn Needle: Tapestry needle for weaving in ends.
- Scissors: Standard yarn scissors.
Preparation Notes:
- Using 100% cotton yarn is highly recommended for durability and easy washing, especially since this item will be used inside a vehicle.
- Keep your foundation chain loose! You will be stitching into both sides of the initial chain to construct a seamless bag base.
Abbreviations and Notes
Abbreviations:
- ch: Chain
- sc: Single Crochet
- dc: Double Crochet
- sl st: Slip Stitch
- st(s): Stitch(es)
- sp(s): Space(s)
- sk: Skip
Pattern Notes:
- The initial ch 3 at the start of double crochet rounds counts as the first dc throughout the pattern.
- The bag base is worked in the round around both sides of the foundation chain.
- The body features an alternating textured repeat of open mesh double crochet rounds and solid single crochet rounds.
- The long hanging strap on the back is designed to fit over car seat headrest posts, gear shifts, or interior knobs.
- Original design and pattern credit belongs to Sara Sach Crochet Designs.

Gauge, Approximate Size, and Pattern Notes
Gauge:
Gauge is not critical for this project. The open mesh stitch pattern provides natural stretch to accommodate items of various shapes.
Finished Size:
- Height: Approximately 12 in (30.5 cm) tall (excluding the hanging loop).
- Circumference: Approximately 16 in (40.6 cm) around (unstretched).
Special Techniques:
- Working on Both Sides of a Chain: Stitching down the top loops of the foundation chain and then turning to work along the unworked bottom loops to create a seamless oval base.
- Back Hanging Loop Integration: Creating an extended chain loop directly on the back rim of the bag to create a heavy-duty hanging strap.
Step-by-Step Pattern
Part 1: Base of the Bag
Work in continuous oval rounds around the foundation chain:
- Foundation: Loosely ch 29.
- R1: Dc in the 4th ch from hook (the skipped 3 chains count as 1 dc). Dc in each ch across to the last ch. In the last ch, work 2 dc. Turn to work down the opposite side of the foundation chain: Dc in each ch back across, and work 2 dc in the final space (base of the starting ch 3). Sl st to top of starting ch 3 to join. (56 dc: 28 sts on each side)
- R2: Ch 3 (counts as 1 dc), dc in each dc around. Sl st to top of starting ch 3 to join. (56 dc)
- R3: Ch 3 (counts as 1 dc), dc in next st. *Ch 1, sk next st, dc in next 2 sts; rep from * around, ending with ch 1, sk last st. Sl st to top of starting ch 3 to join, ch 1. (38 dc, 19 ch-1 sps = 57 total sts)
Part 2: Body of the Bag
Work in alternating mesh and solid rounds:
- R4: Sc in first 2 dc, *sc in ch-1 sp, sc in next 2 dc; rep from * around, working 1 sc in the final ch-1 sp. Sl st to first sc to join, ch 3. (57 sc)
- R5: Dc in next sc (ch 3 + dc counts as first 2 dc). *Ch 1, sk next sc, dc in next 2 sc; rep from * around, ending with ch 1, sk last sc. Sl st to top of starting ch 3 to join, ch 1. (57 sts)
- R6: Sc in each dc and in each ch-1 sp around. Sl st to first sc to join, ch 3. (57 sc)
- R7–R26: Repeat R5 and R26 sequentially for 20 additional rounds, making sure to end on a solid single crochet round (R26). (57 sc)

Part 3: Hanging Loop & Top Band
Back Strap Integration:
- R27: Sc in the first 9 sc. Ch 24 (hanging loop chain). Sk next 10 sc on the body. Sc in the next sc. Sc in each remaining sc around the rim of the bag. Sl st to first sc to join, ch 1.
- R28: Sc in each sc around the top rim, and work 1 sc in each of the 24 chain sts along the hanging loop. Sl st to first sc to join.
- Fasten off yarn and weave in all loose ends.
Part 4: Drawstring Cord & Assembly
Drawstring Cord:
- Foundation: Make a slip knot and ch 60.
- Fasten off. Tie a firm knot at both ends of the chain cord close to the stitches and trim the excess yarn tails.
Assembly & Setup:
- Thread the drawstring cord in and out through the single crochet round (R26) just below the final top band rounds, centering the two loose ends at the front of the bag.
- Knot the two drawstring ends together loosely to pull the top opening slightly snug.
- Insert a plastic grocery bag inside the pouch and fold the plastic handles over the rim.
- Hang the bag over a car headrest post, console, or door handle for instant car organization.
Detailed Pattern Breakdown
1. Base Setup Breakdown (R1 – R3):
- Oval Foundation Building: Starting with 29 loose chains, working down one side with single double crochets, and placing 2 double crochets in the end chain creates a smooth curve without harsh corners. Turning to work on the opposite side of the chain doubles the total stitch count from 28 to 56 stitches.
- Flaring the Opening: On R3, introducing a
ch 1, sk 1, 2 dcsequence adds an extra chain space at the end of the round. This subtly increases the total stitch count from 56 to 57 stitches, giving the bag a slight, functional flare that makes inserting items effortless.
2. Mesh Body Structure Breakdown (R4 – R26):
- Stretchy Openwork: Alternating between a open mesh round (
2 dc, ch 1, sk 1) and a solid round (sc in each st and ch-1 sp) creates a flexible fabric matrix. This structural stretch allows the bag to expand dynamically when filled with bulkier items like drink cans or snack boxes, while returning to its compact shape when empty.
3. Hanging Strap & Drawstring Breakdown (R27 – R28 & Assembly):
- Reinforced Load-Bearing Loop: Skipping 10 stitches on the back rim and bridging them with a 24-chain loop creates a wide strap. Working a dedicated round of single crochets directly over each chain stitch on R28 double-reinforcement strengthens the strap against weight pulling down from heavier contents.
- Containment Drawstring: Weaving the 60-chain cord through the top single crochet round allows the top opening to gather inward just enough to keep trash contained while traveling, preventing items from spilling onto the floor mats.
Pattern Question:
Question 1: Why is it recommended to use 100% cotton yarn instead of acrylic yarn for a car trash bag?
Answer: Cotton yarn is far more durable, holds its structural shape better under heavy items, and can withstand frequent machine washing without pilling.
Since car trash bags come into contact with food crumbs and drink spills, being able to toss the entire bag into the washing machine makes cotton the ideal fiber choice.
Question 2: Can I adjust the size of the hanging loop if my car headrests don’t detach?
Answer: Yes! If you plan to hang the bag over a gear shift or door hook where a long loop isn’t needed, you can reduce the chain count in Part 3 (R27) from 24 chains down to 12 or 15 chains (skipping 6 to 8 stitches on the body). Alternatively, you can simply tie a decorative knot at the top of the 24-chain loop to shorten it on the fly.
Question 3: How do I ensure the hanging strap is perfectly aligned on the bag?
Answer: Before finishing R27, lay your bag flat on a table with the bottom seam aligned straight. Check that the 10 skipped stitches for the strap are situated precisely in the middle of the back panel.
If your join shifted slightly during the round spirals, adjust your starting single crochets (Part 3, R27) by 1 or 2 stitches to keep the handle centered.
