Matthew 2:3

Ἀκούσας δὲ Ἡρῴδης ὁ βασιλεὺς ἐταράχθη, καὶ πᾶσα Ἱεροσόλυμα μετ᾽ αὐτοῦ·

RBT Greek Interlinear:

Strongs 191; Akousas; Ἀκούσας; he who has heard; V-APA-NMS

Strongs 1161; de; δὲ; and; Conj

Strongs 3588; ho; ὁ; the; Art-NMS

Strongs 935; basileus; βασιλεὺς; king; N-NMS

Strongs 2264; Hērōdēs; Ἡρῴδης; Herod; N-NMS

Strongs 5015; etarachthē; ἐταράχθη; was troubled; V-AIP-3S

Strongs 2532; kai; καὶ; and; Conj

Strongs 3956; pasa; πᾶσα; all; Adj-NFS

Strongs 2414; Hierosolyma; Ἱεροσόλυμα; Foundation of Peace; N-NFS

Strongs 3326; met’; μετ’; in company with; Prep

Strongs 846; autou; αὐτοῦ; himself; PPro-GM3S

RBT Translation:

Ἱεροσόλυμα - Jerusalems

And the King, Sprung of a Hero, he who has listened, was stirred to and fro, and all the Foundations of Peace ("Jerusalems") in company with himself.^7a

LITV Translation:
But Herod the king having heard this, he was troubled and all Jerusalem with him.

ESV Translation:
When Herod the king heard this, he was troubled, and all Jerusalem with him;

Footnotes

7a

Little known, much ignored fact, the Greek here for Jerusalem Ἱεροσόλυμα is grammatically plural. More interesting is that it is referred to with a feminine all/every. Scholars worked hard to come up with explanations (for not translating either the feminine or plural):

"the unusual coupling of the feminine πᾶσα with the neuter plural Ἱεροσόλυμα is easily explained by the supposition that the appellative idea, ἡ πόλις, was in the writer's mind"

Thayers Greek Lexicon

Scholarly explanations often seem to be used as excuses not to translate what is there, i.e. justifications for putting what is written out of public view.

It is odd to use the word "πᾶσα" (which is feminine) with "Ἱεροσόλυμα" (which is neuter plural), because they don’t go together in Greek grammar. The scholar's explanation is that the writer is mentally associating "Ἱεροσόλυμα" (Jerusalem) with a different word "πόλις" (city), which is feminine. In other words, the writer screwed up, but the scholars, who can read minds of ancient writers, understand what he intended. Therefore, the public does not need to see or be bothered by the "discrepency."

There are in fact two forms for this name used in the NT:

The singular Ἰερουσαλήμ

And the Greek neuter plural Ἱεροσόλυμα

 The writer knows what he is writing, and his intentions behind using a feminine all with Jerusalems don't need to be changed.