A fishing rod is a long, thin rod used by anglers to catch fish by manipulating a line ending in a hook (formerly known as an angle, hence the term "angling"). At its most basic form, a fishing rod is a straight rigid stick/pole with a line attached to one end (as seen in traditional Tenkara fishing); however, modern rods are usually elastic and generally have the line stored in a reel mounted at the rod handle, which is hand-cranked and controls the line retrieval, as well as numerous line-restricting rings (also known as line guides) that distribute bending stress along the rod and help dampening down/prevent line whipping and entanglement. To better entice fish, baits or lures are dressed onto the one or more hooks attached to the line, and a bite indicator is used, some of which (e.g. quiver tip) might be incorporated as part of the rod itself.

Fishing rod acts as an extended lever and allows the angler to amplify line movements while luring and pulling the fish. It also enhances casting distance by increasing the launch speed of the terminal tackles (the hook, bait/lure, and other co-launched attachments such as float and sinker/feeder), as a longer swing radius (compared to that of a human arm) corresponds to greater arc speed at the tip under the same angular velocity. The length of fishing rods usually vary between 0.6 m (2 ft) and 4.6 m (15 ft) depending on the style of angling, while the Guinness World Record is 22.45 m (73 ft 7.9 in).

Traditional fishing rods are made from single piece of hardwood (such as ash and hickory) or bamboo; while contemporary rods are usually made from alloys (such as aluminium) or more often high-tensile synthetic composites (such as fibreglass or carbon fiber), and may come in multi-piece or telescoping forms that are more portable and storage-friendly. Most fishing rods are tapered towards the tip to reduce the gravitational leverage front of the handle that an angler has to overcome when lifting the rod. Many modern rods are also constructed from hollow blanks to increase the specific strength of the design and reduce the overall weight.

In contrast with fishing nets and traps, which are usually used in subsistence and commercial fishing, angling with rods is a far less efficient method of catching fish, and is used more often in recreational fishing and competitive casting, which focus less on the yield and more on the experience. Fishing rods also come in many sizes, actions, hardness and configurations depending on whether they are to be used for small, medium or large fish or in different fresh- or saltwater situations. Various types of fishing rods are designed for specific subtypes of angling, for instance: spin fishing rods (both spinning and baitcasting rods) are optimized for frequent, repeated casting, and are usually lighter and have faster action; fly rods are designed to better sling heavy lines and ultralight artificial flies, and are usually much more flexible; surfcasting rods are designed to cast baits or lures out over far distances, and tends to be quite long; ice fishing rods are designed to fish through small drilled holes in ice covered lakes and usually very short; and trolling rods are designed to drag heavy bait or lures through water while boat fishing, and usually have greater ultimate tensile strength due to the large sizes of the target fish.