The 26-year-old DNCE singer was spotted having a stroll with the his new girl before the duo attended a Grammys after-party, reported E! online.
"They are not an exclusive couple yet just dating. He is not looking for anything serious at this moment, but really enjoys her company and she is a fun girl," a source said.
Jonas dated Gigi Hadid for five months before they split in November last year.
The model is currently dating former One Direction member Zayn Malik.