Yes, if it is in a language other than English. Every foreign-language document submitted for a US immigration case needs a full English translation with the translator's certification that it is complete and accurate and that they are competent to translate the language.
Police certificates are short, but every word on them carries weight. The key line, whether the certificate says no record was found or lists entries, is translated exactly as written, together with the issuing authority, the applicant's identifying details, the reference or verification number, the validity statement and any stamps or signatures.
Some countries issue certificates in English or in a bilingual format. If every part of yours is already in English, no translation is needed. If any stamp, note or section appears only in another language, that part needs translating, and the clearest approach is to translate the certificate in full.