Demographics
Historical population
| Census | Pop. | Note | %± |
| 2010 | 195 | | — |
|---|
| 2020 | 159 | | −18.5% |
|---|
Manchester first appeared as a census designated place in the 2010 U.S. census.[23]
The 2020 United States census reported that Manchester had a population of 159. The population density was 60.7 inhabitants per square mile (23.4/km2). The racial makeup of Manchester was 101 (63.5%) White, 0 (0.0%) African American, 4 (2.5%) Native American, 1 (0.6%) Asian, 1 (0.6%) Pacific Islander, 13 (8.2%) from other races, and 39 (24.5%) from two or more races. Hispanic or Latino of any race were 44 persons (27.7%).[24]
The whole population lived in households. There were 67 households, out of which 14 (20.9%) had children under the age of 18 living in them, 27 (40.3%) were married-couple households, 8 (11.9%) were cohabiting couple households, 26 (38.8%) had a female householder with no partner present, and 6 (9.0%) had a male householder with no partner present. 21 households (31.3%) were one person, and 8 (11.9%) were one person aged 65 or older. The average household size was 2.37.[24] There were 37 families (55.2% of all households).[25]
The age distribution was 34 people (21.4%) under the age of 18, 10 people (6.3%) aged 18 to 24, 37 people (23.3%) aged 25 to 44, 40 people (25.2%) aged 45 to 64, and 38 people (23.9%) who were 65 years of age or older. The median age was 43.5 years. There were 83 males and 76 females.[24]
There were 88 housing units at an average density of 33.6 units per square mile (13.0 units/km2), of which 67 (76.1%) were occupied. Of these, 55 (82.1%) were owner-occupied, and 12 (17.9%) were occupied by renters.[24]