The Orion 27 is an American sailboat that was designed by Henry Mohrschladt as a cruiser and first built in 1979.^[1][2]

The Orion 27 design was developed into the Orion 27-2 in 1981.^[3]

The design was built by Pacific Seacraft in the United States, from 1979 until 1981, but it is now out of production.^[1][4]

The Orion 27 is a recreational keelboat, built predominantly of fiberglass, with the decks having a plywood core, with wood trim. It has a masthead sloop, cutter rig or yawl rig, a raked stem with a bowsprit, an angled transom, an internally mounted spade-type rudder controlled by a wheel and a fixed long keel. It displaces 10,000 lb (4,536 kg) and carries 3,200 lb (1,451 kg) of lead ballast.^[1][5]

The boat has a draft of 4.00 ft (1.22 m) with the standard keel and is fitted with an inboard diesel engine of 15 hp (11 kW) for docking and maneuvering.^[1]

There are two interior arrangements, designated "A" and "C". Both have sleeping accommodation for five people, with a double "V"-berth in the bow cabin and an aft cabin with a single berth on the port side. The "A" has a drop-down U-shaped dinette, while the "C" has a two bench dinette table, which allows a bigger head with a shower. The galley is located on the starboard side, just forward of the companionway ladder. The galley is equipped with a two-burner stove and a double sink.^[5]

The boat is supported by an active class club, the Pacific Seacraft Orion 27 Club.^[6]

A review in Blue Water Boats, described the design as, "beautiful, strong, and capable". The review went on to say, "unsurprisingly for a Mohrschladt design, the Orion 27 has conservative lines. Under the waterline is a long keel with a forefoot cutaway to improve nimbleness and reduce wetted area. The sections carry the tried and true wine-glass shape. Don’t expect record setting pace with this kind of shape; think strong, safe, and good manners for heaving-to in the rough."^[5]

• List of sailing boat types