| Official Name: | Trescasas |
| Settlement Type: | Municipality |
| Pushpin Map: | Spain Castile and León#Spain |
| Pushpin Map Caption: | Location in Spain. |
| Subdivision Type: | Country |
| Subdivision Type1: | Autonomous community |
| Subdivision Type2: | Province |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Trescasas |
| Leader Title: | Mayor |
| Leader Name: | Borja Lavandera Alonso (PSOE) |
| Area Total Km2: | 32.84 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
Trescasas is a municipality located in the province of Segovia, Castile and León, Spain. According to the 2022 census (INE), the municipality has a population of 1090 inhabitants.[1]
It borders to the north with Espirdo, Cabanillas del Monte and Torrecaballeros, to the south with Palazuelos de Eresma, to the east with the province of Madrid and to the west with La Lastrilla and San Cristóbal de Segovia.
| Northwest: Espirdo | North: Torrecaballeros, Cabanillas del Monte | Northeast: Torrecaballeros, Cabanillas del Monte | |
| West: La Lastrilla, San Cristóbal de Segovia | East: Rascafría (Madrid) | ||
| Southwest: Palazuelos de Eresma | South: Palazuelos de Eresma | Southeast: Palazuelos de Eresma, Rascafría (Madrid) |
According to the Köppen climatic classification, Trescasas falls within the Csb variant,[2] that is, a Mediterranean climate with oceanic influence, with mild and dry summers, with the mean of the warmest month not exceeding 22 °C.