| North Clay High School | |
| Streetaddress: | 500 S. Route 45 |
| City: | Louisville |
| State: | Illinois |
| Zipcode: | 62858 |
| Country: | USA |
| District: | North Clay Unit District #25 |
| Teaching Staff: | 14.44 (FTE) |
| Act: | English: 19 Math: 18 Reading: 20 |
| Gender: | Co-ed |
| Schooltype: | public high school |
| Grades: | 9 – 12 |
| Campus: | rural |
| Team Name: | Cardinals |
| School Colors: | Scarlet and Black |
| Students: | 191 (2018–19)[1] |
| Ratio: | 13.23 |
North Clay High School, also called Louisville-North Clay or just Louisville, is a public high school serving students in grades 9-12 in northern Clay County, Illinois, USA. It is the only high school in the North Clay Unit School District #25.
The school offers baseball (fall and spring), Girls softball, volleyball, Boys and Girls basketball and cross country. The school competes in the IHSA as part of the Midland Trail conference.
Cheer, cheer for ole North Clay HighWake up the echoes, victory is nighSend the rally cheer on highShake down the thunder from the sky.
Although our odds be great or smallOle North Clay High will win over allWhile our Loyal Sons are marching onward to victory.
(Repeat from Cheer, cheer for ole North Clay High)
(After the second time through the cheerleaders yell:)
Cha ha, Cha ha, Cha ha ha haNorth Clay CardinalsRah, Rah, Rah