1900s (20th Century) Maps of San Ildefonso, Coamo
Explore 12 historic maps of San Ildefonso from the 1900s (20th Century). These maps offer a rare glimpse into what life looked like during the 1900s — showing old roads, neighborhoods, homes, and landmarks that have changed or disappeared over time.
Whether you're researching your family's past, planning a metal detecting trip, or studying how San Ildefonso's landscape evolved across the 1900s, these high-resolution maps are a powerful tool for exploring the history of this region.
- Focus on a specific era: All maps on this page are from the 1900s, giving you a focused view of this time period.
- See what’s changed: Compare century-old streets, trails, and buildings to today's modern landscape using overlays and satellite layers.
- Research with precision: Use these maps for genealogy, historical research, land use analysis, or educational projects.
- View, download, or print: Maps are fully viewable online in high resolution, and can be downloaded or printed for your own records.
Start exploring San Ildefonso's history through authentic maps from the 1900s. This is your window into the past.
San Ildefonso, Coamo maps
(12)- 1945 Map of Rio Descalabrado
1945 Rio Descalabrado1945 Print · USGSSanta Isabel and the surrounding southern foothills appear here in the final year of the war, showcasing a landscape of traditional haciendas and emerging rural schools. Trace ancestral roots through named estates like Hacienda Miranda or follow the waters of Lago Coamo and the Rio Descalabrado.3 unique versions available - 1946 Map of Coamo
1946 Coamo1946 Print · USGSThe town of Coamo and its surrounding haciendas are captured in the mid-1940s just as the historic mountain roads were modernizing. Genealogists and local historians can locate family estates like Hacienda Esmeralda and Hacienda San José or trace the route to Baños de Coamo. - 1947 Map of Rio Descalabrado SE
1947 Rio Descalabrado SE1947 Print · USGSSouthern Puerto Rico in the late 1940s reveals a landscape defined by sugar haciendas and vital water engineering. Researchers can trace the layout of traditional settlements like Poblado Rio Cañas Arriba or the infrastructure of the Canal de Juana Diaz. - 1947 Map of Rio Descalabrado NE
1947 Rio Descalabrado NE1947 Print · USGSThe mountainous interior of Puerto Rico near the Villalba and Coamo borders is documented here just after the war. Local historians can trace early rural life through features like the Escuela Segunda Unidad de Santa Catalina and the Zanja Blanca settlement. - 1947 Map of Coamo SO
1947 Coamo SO1947 Print · USGSSouthern Puerto Rico's historic thermal springs and plantation estates are captured here in the late 1940s as the agricultural landscape evolved. Researchers can locate named estates and settlements like Hacienda Esmeralda, Baños de Coamo, and Colonia Peñuelas. - 1947 Map of Coamo NO
1947 Coamo NO1947 Print · USGSThe mountain town of Coamo is captured in the mid-1940s, showing a traditional street grid and surrounding agricultural settlements. Genealogists and historians can trace the early footprints of San Diego and Cacao or the paths of the Rio Coamo. - 1952 Map of Rio Descalabrado, 1953 Print
1952 Rio Descalabrado1953 Print · USGSSouthern Puerto Rico's coastal plains and mountain foothills are captured here during the early fifties, showing a landscape defined by military and agricultural life. Researchers can trace the layout of Campo Losey, locate sugar industry landmarks like Central Las Marias, or find family estates such as Hacienda Miranda.2 unique versions available - 1952 Map of Coamo, 1953 Print
1952 Coamo1953 Print · USGSMid-century Puerto Rico is captured here during a period of transition between its historic hacienda economy and modern development. Researchers can trace family roots through named estates like Hacienda Esmeralda or visit the famous thermal springs at Baños de Coamo.2 unique versions available - 1960 Map of Rio Descalabrado, 1962 Print
1960 Rio Descalabrado1962 Print · USGSCoastal plains and foothills near Santa Isabel and Juana Díaz are captured here during a period of agricultural and military significance. Researchers can trace historic estate boundaries at Hacienda Miranda and Hacienda Altura or locate local centers like Paso Seco.2 unique versions available - 1960 Map of Coamo, 1962 Print
1960 Coamo1962 Print · USGSThe southern foothills of the Cordillera Central come into focus in the early sixties, centered on the growing town of Coamo. Researchers can locate historic agricultural sites like Hacienda Buena Vista or trace the boundaries of the Salinas Training Area.2 unique versions available - 1972 Map of Coamo, 1973 Print
1972 Coamo1973 Print · USGSThe town of Coamo sits at the edge of the Cordillera Central in the early seventies, showing a landscape of traditional haciendas and modern military training grounds. Genealogists can locate family names and sites like Hacienda Buena Vista, San Diego, and the Escuela Federico Degetau.3 unique versions available - 1972 Map of Rio Descalabrado, 1974 Print
1972 Rio Descalabrado1974 Print · USGSSouthern Puerto Rico in the early seventies shows a transition from traditional sugarcane estates to modern infrastructure. Researchers can trace the boundaries of historic haciendas like Hacienda Amelia or locate the Fort Allen Naval Radio Station and Lago Coamo.4 unique versions available
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