The Ericson 25, also called the Ericson 25 Mark I is an American trailerable sailboat that was designed by Bruce King as a cruiser and first built in 1973.^[1][2][3]

The design was replaced in the company product line in 1978 by the Ericson 25+, also called the Ericson 25 Mark II.^[1][3][4]

The design was built by Ericson Yachts in the United States, from 1973 until 1978, but it is now out of production.^[1][3][5]

The Ericson 25 is a recreational keelboat, built predominantly of fiberglass, with wood trim. It has a masthead sloop rig, a raked stem, an angled transom, a transom-hung rudder controlled by a tiller and a fixed fin keel or an optional keel and centerboard combination.^[1][3]

A tall rig was also available, with a mast about 2.5 ft (0.76 m) taller, intended for areas with lighter winds.^[1]

The boat is normally fitted with a small inboard engine or a 6 to 10 hp (4 to 7 kW) outboard motor for docking and maneuvering. The fuel tank holds 9 U.S. gallons (34 L; 7.5 imp gal).^[1][3]

The design has sleeping accommodation for four people, with a double "V"-berth in the bow cabin and two straight settee quarter berths in the main cabin, around a drop-leaf table. The galley is located on both sides of the companionway ladder. The galley is equipped with a two-burner stove, an icebox and a sink. The head is located just aft of the bow cabin on the starboard side. Cabin headroom is 66 in (170 cm) and the fresh water tank has a capacity of 9 U.S. gallons (34 L; 7.5 imp gal). There is an anchor locker in the bow.^[1][3]

For downwind sailing the design may be equipped with a spinnaker.^[1]

The design has a PHRF racing average handicap of 234 and a hull speed of 6.1 kn (11.3 km/h).^[3]

Ericson 25 fin keel

This model displaces 5,100 lb (2,313 kg) and carries 2,500 lb (1,134 kg) of lead ballast. The boat has a draft of 3.80 ft (1.16 m) with the standard keel.^[1][3]

Ericson 25 keel and centerboard

This model displaces 5,400 lb (2,449 kg) and carries 2,500 lb (1,134 kg) of ballast. The boat has a draft of 5.0 ft (1.5 m) with the centerboard down and 2.0 ft (0.61 m) with it retracted.^[1][3]

In a 2010 review Steve Henkel wrote, "when she came out in 1972, this vessel was seen as remarkably roomy for a 25-footer, as indeed she was ... The Ericson 25 Mk I ... is well-finished and nicely laid out for comfortable alongshore cruising, She is also designed to race, with testing done in the Davidson Laboratory at Stevens Institute and a hull rated as a quarter-tonner. Best features: She cleverly combines a high aspect ratio centerboard with a trunk almost totally beneath the cabin sole, eliminating the nuisance of a protruding trunk splitting the cabin in two. Her sales brochure touts her easy trailerability, and shows a photo of the boat on a four-wheel trailer, her 7,700 pounds of load towed by a Cadillac sedan—something that today no ordinary car, including a Cadillac, could come close to doing. Worst features: We could not come up with any significant negative features."^[3]

• List of sailing boat types