How Many People In Maine Are Over 100 Years Old? Happy 101st Birthday to Frank Averill! Frank lives at the Maine Veterans Home in Scarborough. He was celebrated this past week by the Scarborough community with music from Scarborough High School and a challenge coin from the Scarborough Police Department. We know that Maine, with 20.6 % of our population being over 65, is per capita the oldest population in the country, but how many of us are at that 100-year-old mark? How Many Mainers Are Over 100 Years Old? Scarborough Police Facebook According to the 2010 US Census, there were 298 Mainers over 100 years old. However, we think that number has probably gone UP as the total number of centenarians in the USA has gone from 53,000 folks in 2010 to more than 90,000 in 2020.