Old Martin County Courthouse, Art Deco courthouse in Stuart, United States.

The Old Martin County Court House at 80 Southeast Ocean Boulevard in Stuart is a 1937 Art Deco addition to the county's first courthouse, built by Chalker & Lund of poured concrete with terrazzo floors to designs by L. Phillips Clarke of Harvey and Clarke. The words "Martin County Court House" are etched into its front. Bland 1954 extensions were later added on both sides.

The 1937 building was a northern addition to Martin County's first courthouse, a 1908 structure that had served as a Palm Beach County public school before its conversion after the county was created in 1925. Funded by the Works Progress Administration, it was designed by L. Phillips Clarke of Harvey and Clarke and built by Chalker & Lund. In 1954 the county extended it west to a former Ford dealership and A&P grocery converted into an annex.

Since 2007 the building has been listed on the Martin County Historic Register and is now the Courthouse Cultural Center, headquarters of the Arts Council, Inc., the designated local arts agency for Martin County. The council runs exhibitions and events in the former courtrooms. Look for the words "Martin County Court House" etched into the front of the 1937 addition.

The building stands at 80 Southeast Ocean Boulevard in Stuart, the Martin County seat, on the block facing the St. Lucie River waterfront. It is the 1937 northern addition, so look for the section carrying the etched words "Martin County Court House" rather than the demolished 1908 schoolhouse. The City of Stuart saved this wing when the rest of the courthouse complex was torn down.

The words "Martin County Court House" were etched into the front of the 1937 addition and remain there. Because of that inscription, both the National Register listing and the cultural center keep the two-word spelling "Court House" rather than today's one-word form.