At the 2010 census there were 442 people, 155 households, and 108 families living in the town. The population density was. There were 188 housing units at an average density of. The racial makeup of the town was 98.2% White, 1.1% Native American, 0.2% Asian, and 0.5% from two or more races. Hispanic or Latino of any race were 0.2%. Of the 155 households 36.1% had children under the age of 18 living with them, 58.7% were married couplesliving together, 5.2% had a female householder with no husband present, 5.8% had a male householder with no wife present, and 30.3% were non-families. 22.6% of households were one person and 8.4% were one person aged 65 or older. The average household size was 2.85 and the average family size was 3.40. The median age in the town was 36.8 years. 29.2% of residents were under the age of 18; 6% were between the ages of 18 and 24; 23.8% were from 25 to 44; 30.6% were from 45 to 64; and 10.4% were 65 or older. The gender makeup of the town was 49.3% male and 50.7% female.
At the 2000 census there were 415 people, 155 households, and 110 families living in the town. The population density was 11.8 people per square mile. There were 184 housing units at an average density of 5.2 per square mile. The racial makeup of the town was 99.28% White, 0.24% Native American, 0.24% Asian, and 0.24% from two or more races. Of the 155 households 33.5% had children under the age of 18 living with them, 60.6% were married couples living together, 7.1% had a female householder with no husband present, and 29.0% were non-families. 25.8% of households were one person and 14.2% were one person aged 65 or older. The average household size was 2.68 and the average family size was 3.25. The age distribution was 27.0% under the age of 18, 8.9% from 18 to 24, 28.7% from 25 to 44, 20.5% from 45 to 64, and 14.9% 65 or older. The median age was 37 years. For every 100 females, there were 93.9 males. For every 100 females age 18 and over, there were 89.4 males. The median household income was $25,625 and the median family income was $27,917. Males had a median income of $23,625 versus $20,313 for females. The per capita income for the town was $11,751. About 16.4% of families and 20.3% of the population were below the poverty line, including 24.1% of those under age 18 and 26.7% of those age 65 or over.
There is an Amish community in Smyrna, that began as one of the "Christian Communities" of Elmo Stoll in 1996. From the beginning most members had an Amish background, but some came from other plain communities while others had no plain background. Soon after the early death of Elmo Stoll in 1998, the "Christian Communities" began to disband. The community in Smyrna lost most of his members, who had no plain background and then decided to seek fellowship with an Michigan Churches of the Old Order Amish. The Amish in Smyrna are said to be more open to outsiders than other Amish communities. They hold most of their church services in English. They are in fellowship with the Maine Amish in Unity and Hodgdon. Contrary to most other Amish the Amish men in Smyrna wear moustaches along with long beards, which reflects their "Christian Communities" history. In 2005 the Amish community consisted of around 100 people.
