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After filtering for Oklahoma, 6 entries match your criteria.  

 
 

Historical Markers in Harmon County, Oklahoma

 
Clickable Map of Harmon County, Oklahoma and Immediately Adjacent Jurisdictions image/svg+xml 2019-10-06 U.S. Census Bureau, Abe.suleiman; Lokal_Profil; HMdb.org; J.J.Prats/dc:title> https://commons.wikimedia.org/wiki/File:Usa_counties_large.svg Harmon County, OK (6) Beckham County, OK (21) Greer County, OK (28) Jackson County, OK (4) Childress County, TX (10) Collingsworth County, TX (15) Hardeman County, TX (17)  HarmonCounty(6) Harmon County (6)  BeckhamCounty(21) Beckham County (21)  GreerCounty(28) Greer County (28)  JacksonCounty(4) Jackson County (4)  ChildressCountyTexas(10) Childress County (10)  CollingsworthCounty(15) Collingsworth County (15)  HardemanCounty(17) Hardeman County (17)
Hollis is the county seat for Harmon County
Adjacent to Harmon County, Oklahoma
Beckham County (21)  ►
Greer County (28)  ►
Jackson County (4)  ►
Childress County, Texas (10)  ►
Collingsworth County, Texas (15)  ►
Hardeman County, Texas (17)  ►
 
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1 ► Oklahoma, Harmon County, Gould — Former Area Schools —
Bethel 1892-1935, located 2 mi. west Purvis Hill 1900-1938, located 3 mi. east, 1 mi. south La Homa 1917-1939, located 4 mi. north, 2.5 mi. east Louis Hill 1939-1960, located 1 mi. east — — Map (db m298974) HM
2 ► Oklahoma, Harmon County, Hollis — 100th Meridian Oklahoma/Texas State Line —
The 100th meridian first marked the boundary between the Republic of Texas and the vast Louisiana Purchase establishing this boundary was one of the most far reaching events in which the nation engaged. In 1927 the U.S. Supreme Court . . . — — Map (db m100199) HM
3 ► Oklahoma, Harmon County, Hollis — 242 — La Casa School —
La Casa was located five miles south of this marker. It was formed by consolidating three schools: Mesquite, Star Valley and Bearden. Classes began in a new building after Christmas 1925. With the first graduate in 1928, La Casa was the nucleus of . . . — — Map (db m298976) HM
4 ► Oklahoma, Harmon County, Hollis — Old Greer County —
S. and W. of North Fork of Red R. Greer Co. was named and governed as part of Texas from 1860 until 1896 when U. S. Supreme Crt. decision made it part of Oklahoma Ter. This county area was claimed by 14 different governments from 1669 to . . . — — Map (db m298975) HM
5 ► Oklahoma, Harmon County, Hollis — 235 — Ron School — The Ron School Cubs —
Was located 3 miles east and 1/2 mile south of this marker. The school was formed in the spring of 1939 by a special election to consolidate the schools of Dryden, McKnight, Metcalf and Teacross. The first senior class was 1939 and the last class to . . . — — Map (db m160352) HM
6 ► Oklahoma, Harmon County, Vinson — Vinson —
The town of Vinson has a colorful history. It's one of the first settlements in this part of the country. The town was thriving in 1904 when a storm came thru, lightening struck the north side, burning most of the buildings. Vinson ran north to . . . — — Map (db m287686) HM
 
 
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Oct. 1, 2026