8646 FM 155 is located in LaGrange, Texas, in Fayette County. Fayette County preserves one of the most authentic expressions of Czech and German immigrant heritage in Texas, centered on La Grange and the surrounding communities of Schulenburg and Flatonia. The county's rolling post oak savanna and bottomland farms have been worked by the same families for five and six generations.

The Colorado River flows along the northern boundary of Fayette County, and the terrain transitions from the post oak savanna of the central county to the blackland prairie in the east. Monument Hill State Historic Site overlooks the Colorado River valley, marking a site of significance from the Republic of Texas era.

The 78945 zip code has a median household income of $76,221, a median home value of $299,500, and a median age of 49.7. The average household size is 2.4 people. The zip code has a total population of 10,459.

Agriculture, cattle, row crops, and hay, remains the primary economic driver in Fayette County, supplemented by a growing agritourism sector and proximity to the Austin-Houston corridor along US-90. The county attracts buyers seeking productive bottomland and post oak acreage at agricultural prices.