Here’s the first one in a new decade when disco and funk are replaced with rock and punk:
1. Styx – Babe – 01-1980
2. Randy Crawford – One Day I’ll Fly Away – 09-1980
3. Martha & The Muffins – Echo Beach – 04-1980
4. Police – Don’t Stand So Close To Me – 09-1980
5. Billy Joel – It’s Still Rock And Roll To Me – 09-1980
6. David Bowie – Ashes To Ashes – 08-1980
7. Billy Preston & Syreeta – With You I’m Born Again – 01-1980
8. The Pretenders – Talk Of The Town – 04-1980
9. Queen – Another One Bites The Dust – 09-1980
10. Rainbow – All Night Long – 03-1980
11. Cliff Richard – Carrie – 02-1980
12. Dennis Waterman – I Could Be So Good For You – 11-1980
13. Marti Webb – Take That Look Off Your Face – 03-1980

And a few which deserve an honorary mention:
Sheena Easton – 9 to 5 (Morning Train) – 08-1980
Michael Jackson – She’s Out Of My Life – 05-1980
Judas Priest – Breaking The Law – 06-1980
Liquid Gold – Dance Yourself Dizzy – 03-1980
Don McLean – Crying – 06-1980
New Muzik – Living By Numbers – 02-1980
Olivia Newton-John/The Electric Light Orchestra – Xanadu – 07-1980
The Nolans – I’m In The Mood For Dancing – 01-1980
Odyssey – Use It Up And Wear It Out – 07-1980
Saxon – 747 (Strangers In The Night) – 07-1980
Barbra Streisand – Woman In Love – 10-1980
Jona Lewie – Stop The Cavalry – 12-1980
John & Yoko & The Plastic Ono Band – Happy Xmas (War Is Over) – 12-1980