| Place Name | Markham |
| Place Type | Census Designated Place |
| ZIP Code(s) | 77414 |
| County | Matagorda County |
| Area Code(s) | 979 |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 983 |
| Population Growth Rate (2010-19) | -16.08% |
| Majority Ethnicity | White 54.66% |
| Metro/Micro Stats Area | Bay City, TX |
| US Congressional District(s) | Texas 27th |
| State House Districts | 25 |
| State Senate Districts | 18 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 54.66% |
| African American | 4.71% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 40.63% |