The Endeavor 26 is an American trailerable sailboat that was designed by Bill Lapworth as a racer and day sailer and first built in 1963.

The design was built by W. D. Schock Corp in the United States, from 1963 until 1967 with a total of 56 boats completed. It is now out of production.

The Endeavor 26 is a racing keelboat, built predominantly of fiberglass, with wood trim. It has a fractional sloop rig; a spooned, raked stem, a raised counter, angled transom, a keel-mounted rudder controlled by a tiller and a fixed fin keel. It displaces 3,200 lb (1,451 kg) and carries 1,600 lb (726 kg) of lead ballast.

The boat has a draft of 4.00 ft (1.22 m) with the standard keel.

The design has sleeping accommodation for four people, with a double "V"-berth in the bow cabin and two straight settees in the main cabin. The head is located centered in the bow cabin under the "V"-berth.

For sailing downwind the design may be equipped with a symmetrical spinnaker of 340 sq ft (32 m²).

The design has a hull speed of 5.69 kn (10.54 km/h).