During the 1915-1916 school year, Cowlitz County had 21 school districts. This list was taken from Educational Directory: State of Washington (subtitle: "Statistics for the School Year Ending June 30, 1916").

The County Superintendent for Cowlitz County was Miss Lucia Jenkins (the superintendent's office was located in Kalama, the county seat at the time).

The average annual salary for principals/superintendents was $880, ranging from $549 (Kalama River) to $1,400 (Kalama and Kelso).

The average annual salary for high school teachers was $745, ranging from $630 (Silver Lake) to $815 (Kelso). The average annual salary for grade school teachers was $580, ranging from $360 (Lexington) to $741 (Kalama).

The average cost per student per year was $56.50, ranging from $28.98 (Reno) to $150.34 (Kidd Valley).

School District Post Office Enrollment Grades taught Principal or Superintendent
Ariel No. 21 Ariel 35 1 - 8 Nora E. Kelly
Carrolls No. 105 Carrolls 81 1 - 11 Clara Miller
Castle Rock No. 106 Castle Rock 372 1 - 12 B. S. Duskin
Clover Dale No. 22 Kalama 33 1 - 8 Ruth Wilson
Coal Creek No. 55 Mt. Solo 54 1 - 8 Gunhild Peterson
Eufaula No. 101 Mt. Solo 58 1 - 9 S. D. Williams
Freeport No. 1 Kelso 52 1 - 8 Ruth Hendrickson
Kalama No. 107 Kalama 265 1 - 12 E. E. Coad
Kalama River No. 47 Kalama 28 1 - 8 Lucile Lane
Kelso No. 36 Kelso 700 1 - 12 Lee F. Jones
Kidd Valley No. 79 Toutle 13 1 - 9 Julia McCarthy
Lexington No. 2 Lexington 34 1 - 8 Alfred McCorkle
Oak Point No. 69 Oak Point 70 1 - 8 Max E. Heibel
Ostrander No. 26 Ostrander 58 1 - 8 Stella Haussler
Reno No. 40 Woodland 57 1 - 8 W. O. Powell
Sandy Bend No. 20 Castle Rock 38 1 - 11 Lillian Hewes
Shanghai No. 82 Carrolls 68 1 - 8 G. H. Scobey
Silver Lake No. 103 Silver Lake 121 1 - 11 Kirby J. Smith
Toutle No. 104 Toutle 44 1 - 10 Ruth Leaming
Tower No. 80 Tower 12 1 - 9 Helen Argyle
Woodland No. 102 Woodland 300 1 - 12 Frederick Stukert