根据印度最近一次人口普查（2011年），结果如下
总人口138.4万人（1383727，其中男713912，女669815），比2001年增加26.03%
性比男：女=1000:938
人口密度每平方公里17人（全印度平均324人）
识字率65.38%（其中男72.55%，女53.12%）
城市化率：22.94%的居民（317369人 ）居住在城镇
城镇居民性比1000:890
识字率82.93%（男88.45%，女67.14%）
城镇居民中0-6岁儿童占12.57%，男女童比例1000：957
乡村居民性比1000:953
识字率59.94%（男67.44%，女59.14%）
乡村居民中0-6岁儿童占16.16%，男女童比例1000：975

http://www.census2011.co.in/census/state/arunachal+pradesh.html
As per details from Census 2011, Arunachal Pradesh has population of 13.84 Lakhs, an increase from figure of 10.98 Lakh in 2001 census. Total population of Arunachal Pradesh as per 2011 census is 1,383,727 of which male and female are 713,912 and 669,815 respectively. In 2001, total population was 1,097,968 in which males were 579,941 while females were 518,027
Arunachal Pradesh Population Growth Rate
The total population growth in this decade was 26.03 percent while in previous decade it was 26.21 percent. The population of Arunachal Pradesh forms 0.11 percent of India in 2011. In 2001, the figure was 0.11 percent.
Arunachal Pradesh Literacy Rate 2011
Literacy rate in Arunachal Pradesh has seen upward trend and is 65.38 percent as per 2011 population census. Of that, male literacy stands at 72.55 percent while female literacy is at 53.52 percent. In 2001, literacy rate in Arunachal Pradesh stood at 54.34 percent of which male and female were 65.43 percent and 40.23 percent literate respectively.
In actual numbers, total literates in Arunachal Pradesh stands at 766,005 of which males were 439,868 and females were 326,137.
Arunachal Pradesh Density 2011
Total area of Arunachal Pradesh is 83,743 sq. km. Density of Arunachal Pradesh is 17 per sq km which is lower than national average 382 per sq km. In 2001, density of Arunachal Pradesh was 13 per sq km, while nation average in 2001 was 324 per sq km.
Arunachal Pradesh Sex Ratio
Sex Ratio in Arunachal Pradesh is 938 i.e. for each 1000 male, which is below national average of 940 as per census 2011. In 2001, the sex ratio of female was 901 per 1000 males in Arunachal Pradesh.
Arunachal Pradesh Urban Population 2011
Out of total population of Arunachal Pradesh, 22.94% people live in urban regions. The total figure of population living in urban areas is 317,369 of which 167,901 are males and while remaining 149,468 are females. The urban population in the last 10 years has increased by 22.94 percent.
Sex Ratio in urban regions of Arunachal Pradesh was 890 females per 1000 males. For child (0-6) sex ratio the figure for urban region stood at 957 girls per 1000 boys. Total children (0-6 age) living in urban areas of Arunachal Pradesh were 39,899. Of total population in urban region, 12.57 % were children (0-6).
Average Literacy rate in Arunachal Pradesh for Urban regions was 82.93 percent in which males were 88.45% literate while female literacy stood at 67.14%. Total literates in urban region of Arunachal Pradesh were 230,103.
Arunachal Pradesh Rural Population 2011
Of the total population of Arunachal Pradesh state, around 77.06 percent live in the villages of rural areas. In actual numbers, males and females were 546,011 and 520,347 respectively. Total population of rural areas of Arunachal Pradesh state was 1,066,358. The population growth rate recorded for this decade (2001-2011) was 77.06%.
In rural regions of Arunachal Pradesh state, female sex ratio per 1000 males was 953 while same for the child (0-6 age) was 975 girls per 1000 boys. In Arunachal Pradesh, 172,289 children (0-6) live in rural areas. Child population forms 16.16 percent of total rural population.
In rural areas of Arunachal Pradesh, literacy rate for males and female stood at 67.44 % and 49.14 %.
Average literacy rate in Arunachal Pradesh for rural areas was 59.94 percent. Total literates in rural areas were 535,902.

http://www.census2011.co.in/census/state/districtlist/arunachal+pradesh.html