Olathe is located at .
According to the United States Census Bureau, the town has a total area of 1.3 square miles (3.4 km2), all of it land. It is located at the foot of a plateau. The San Juan mountains are south of the town. Adobes to the east commonly used for recreational vehicles such as dirt bikes and four wheelers.
|U.S. Decennial Census|
As of the census of 2000, there were 1,573 people, 520 households, and 383 families residing in the town. The population density was 1,186.8 people per square mile (456.6/km²). There were 571 housing units at an average density of 430.8 per square mile (165.8/km²). The racial makeup of the town was 74.44% White, 0.06% African American, 1.65% Native American, 0.32% Asian, 19.71% from other races, and 3.81% from two or more races. Hispanic or Latino of any race were 35.22% of the population.
There were 520 households out of which 41.5% had children under the age of 18 living with them, 59.0% were married couples living together, 10.2% had a female householder with no husband present, and 26.3% were non-families. 22.9% of all households were made up of individuals and 11.7% had someone living alone who was 65 years of age or older. The average household size was 2.88 and the average family size was 3.44.
In the town, the population was spread out with 31.8% under the age of 18, 10.1% from 18 to 24, 24.7% from 25 to 44, 19.3% from 45 to 64, and 14.0% who were 65 years of age or older. The median age was 31 years. For every 100 females there were 95.2 males. For every 100 females age 18 and over, there were 87.1 males.
The median income for a household in the town was $26,286, and the median income for a family was $31,354. Males had a median income of $22,708 versus $18,077 for females. The per capita income for the town was $12,620. About 15.9% of families and 21.8% of the population were below the poverty line, including 24.7% of those under age 18 and 19.6% of those age 65 or over.
The closest airport served by scheduled airlines is Montrose Regional Airport, located 10 miles south of Olathe.
Olathe Sweet Corn Festival
Since 1992, this annual town festival has been held the first Saturday in August each summer, dedicated to the region's "agricultural jewel", Olathe Sweet Corn. The Festival features such entertainment as craft shows, karaoke, local acts, like the Anders Brothers, Cabin Fever Band, and concerts by bigger names like Three Dog Night in 1996, Kansas in 1998, Styx in 2004, LeAnn Rimes in 2007, Travis Tritt in 2008, and Clint Black in 2009. Any proceeds go to local non-profit groups.
Olathe BMX was established by the Town of Olathe in 2007 and sanctioned by the American Bicycle Association. Olathe BMX is run by volunteers; self-supporting since its conception in 2007, Olathe BMX has produced several state champions.
Olathe is part of the Montrose County School District RE-1J and has three schools within the town limits. Olathe Elementary School has a population of around 500 students and supports grades K through 5. The middle school and high school are attached and create Olathe Middle High School.