Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the following Registration Statements:

(1) Registration Statement (Form S-8 No. 333-234448) pertaining to the 2015 Stock Plan, the 2019 Equity Incentive Plan and the 2019 Employee Stock Purchase Plan of RAPT Therapeutics, Inc.,

(2) Registration Statement (Form S-8 No. 333-237487) pertaining to the 2019 Equity Incentive Plan of RAPT Therapeutics, Inc.,

(3) Registration Statement (Form S-8 No. 333-254127) pertaining to the 2019 Equity Incentive Plan and the 2019 Employee Stock Purchase Plan of RAPT Therapeutics, Inc., and

(4) Registration Statement (Form S-3 No. 333-249848) of RAPT Therapeutics, Inc.;

of our report dated March 10, 2022, with respect to the consolidated financial statements of RAPT Therapeutics, Inc. included in this Annual Report (Form 10-K) of RAPT Therapeutics, Inc. for the year ended December 31, 2021.

                                                                                                                                                /s/ Ernst & Young LLP

Redwood City, California

March 10, 2022