Palmer is a town in Ellis County, Texas, United States. It is part of the Dallas–Fort Worth metroplex. Its population was 2,393 in 2020. Palmer is located in northeastern Ellis County. Interstate 45 passes through the east side of the town, with access from Exits 258 through 260; I-45 leads north 27 miles to downtown Dallas and south 8 miles to Ennis. Waxahachi…Palmer is a town in Ellis County, Texas, United States. It is part of the Dallas–Fort Worth metroplex. Its population was 2,393 in 2020. Palmer is located in northeastern Ellis County. Interstate 45 passes through the east side of the town, with access from Exits 258 through 260; I-45 leads north 27 miles to downtown Dallas and south 8 miles to Ennis. Waxahachie, the county seat, is 11 miles to the west.