For online colleges that offer online degrees/programs, Glasgow Caledonian New York College has the lowest number of students to a faculty (0 to 1) and Middlebury Institute of International Studies at Monterey has the second lowest ratio of 1 to 1 based on academic year 2019-2020 college enrollment data.
Below table ranks and compares the Online Colleges with Smaller Class Size having the lowest students to faculty ratio. For the ranking, we include colleges with more than 50% online students who enrolled online exclusively.

Online Colleges with Smaller Class Size Comparison Table

RankCollege NameIn-State Tuition & FeesOut-of-State Tuition & FeesStudent Population (Total)Online Student PopulationNumber of ProgramsNumber of Online ProgramsStudents to Faculty Ratio
1Glasgow Caledonian New York College
New York, NY
2Middlebury Institute of International Studies at Monterey
Monterey, CA
$39,750$42,80468668615-1 to 1
3Hebrew College
Newton Centre, MA
$25,220$30,0001371111391 to 1
4Sioux Falls Seminary
Sioux Falls, SD
-$3,600508508761 to 1
5National American University-Richardson
Richardson, TX
$15,000$15,00015014820-1 to 1
6National American University-Rochester
Rochester, MN
$15,000$15,000222021-1 to 1
7National American University-Kings Bay
Kings Bay, GA
-$6,07540402-1 to 1
8Shasta Bible College and Graduate School
Redding, CA
$12,060$12,860412213132 to 1
9National American University-Roseville
Roseville, MN
$15,000$15,00013512632-2 to 1
10Curtis Institute of Music
Philadelphia, PA
$2,525$2,52514514510-2 to 1
Average$12,834$17,0277,612,4536,226,864641816 to 1