| Vassar, Kansas | |
| Settlement Type: | CDP |
| Image Map1: | Map of Osage Co, Ks, USA.png |
| Map Caption1: | KDOT map of Osage County (legend) |
| Pushpin Map: | Kansas#USA |
| Pushpin Label: | Vassar |
| Pushpin Label Position: | left |
| Coordinates: | 38.6472°N -95.6225°W |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Kansas |
| Subdivision Type2: | County |
| Subdivision Name2: | Osage |
| Subdivision Type3: | Township |
| Established Title: | Founded |
| Established Title1: | Platted |
| Unit Pref: | Imperial |
| Elevation Ft: | 1106 |
| Population As Of: | 2020 |
| Population Total: | 584 |
| Population Density Sq Mi: | auto |
| Population Density Km2: | auto |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Postal Code Type: | ZIP code |
| Postal Code: | 66543 |
| Area Code Type: | Area code |
| Area Code: | 785 |
| Blank Name: | FIPS code |
| Blank1 Name: | GNIS ID |
| Blank1 Info: | 479316 |
Vassar is a census-designated place (CDP) in Osage County, Kansas, United States. As of the 2020 census, the population was 584.[1] It is located 4miles northeast of Lyndon, also about half a mile south of Pomona Lake.
A post office was opened in La Mont's Hill (an extinct town) in 1871, but it was moved to Vassar in 1887.[2] Vassar has ZIP code 66543.[3]
The Missouri Pacific Railroad previously went through Vassar,[4] but it was abandoned, then later it was converted into the Flint Hills Nature Trail.
The climate in this area is characterized by hot, humid summers and generally mild to cool winters. According to the Köppen Climate Classification system, Vassar has a humid subtropical climate, abbreviated "Cfa" on climate maps.[5]