The Spirit 23, also called the North American 23, is an American trailerable sailboat that was designed by Robert Finch as a cruiser and first built in 1978.

The design was built by Glastron in the United States, starting in 1976, initially by their North American Yachts subsidiary in Henderson, Tennessee, as the North American 23. Morgan Yachts, builders of the North American 40, threatened a lawsuit over the naming, resulting in North American Yachts being sold and the boat being built starting in 1978 by a different Glastron subsidiary, Spirit Yachts, in Austin, Texas as the Spirit 23. Production was ended in 1981.

The Spirit 23 is a recreational keelboat, built predominantly of fiberglass, with wood trim and an optional cabin "pop-top" for increased headroom. It has a masthead sloop rig, a raked stem, a reverse transom, a transom-hung rudder controlled by a tiller and a stub keel with a retractable centerboard or with a fixed fin keel. A "kick-up" rudder was a factory option.

The boat is normally fitted with a small 3 to 6 hp (2 to 4 kW) outboard motor for docking and maneuvering.

The design has sleeping accommodation for four people, with a double "V"-berth in the bow cabin, a drop-down dinette and a straight settee in the main cabin. An alternate main cabin plan provided two settee berths in place of the dinette. In this latter arrangement the starboard berth is 10.0 ft (3.0 m) long. The galley is located on the starboard side just aft of the bow cabin and is equipped with a two-burner stove and a sink. The head is located in the bow cabin on the port side under the "V"-berth. Cabin headroom is 57 in (145 cm) or 74 in (188 cm) with the optional "pop-top" open.

The design has a PHRF racing average handicap of 240 and a hull speed of 6.0 kn (11.1 km/h).