Sinuri (Ancient Greek: Σινυρι) was a sanctuary of the god Sinuri in ancient Caria, Anatolia. The ruins of Sinuri are located on the hilltop now called Tarla Tepe, close to the modern village of Çamlıbelen, Milas [tr], Muğla Province, Turkey. It was an active religious centre for over a thousand years, from the Archaic period to late antiquity. The community at Sinuri erected a large number of inscriptions from the 4th to the 1st centuries BCE, and it is one of the most important known find-sites for inscriptions in the Carian language. Extensive excavations halted in 1937 and organised archaeological activity only resumed in 2022.

Sinuri was situated in a mountain pass in central Caria. Although two Neolithic stone axes show the age of the site, the archaeological evidence only proves that Sinuri experienced sporadic inhabitation as a natural refuge from the Geometric period onwards. A temenos wall from the 7th century BCE demonstrates that Sinuri had become was a developed religious space. Regular religious activity would have been conducted in the open, perhaps in a sacred grove, as excavations have found no evidence of Archaic buildings within the outer temenos walls. Sacred groves were common in Archaic Caria, such as at Labraunda, Lagina, and Kasossos.

The sanctuary of Sinuri was governed by a 'clan' or 'fraternity' called syngeneia (Ancient Greek: συγγένεια). Most members of the syngeneia lived in the nearby village of Hierakome. The epigraphic evidence shows that the governing syngeneia was initially that of Pelekos, which was renamed for unknown reasons to the syngeneia of Ponmoonous or Pormounous in the mid-4th century BCE. Pelekos may have been the historical or mythical founder of the all-male priesthood of Sinuri, as his name begins a list of historical priests inscribed in the 2nd century BCE.

Alongside Labraunda and Amyzon, Sinuri was one of three rural highland sanctuaries which benefited from extensive patronage by the Hecatomnids who ruled Caria as satraps in the 4th century BCE. The sanctuary was enlarged and rebuilt on terraces, obscuring the previous Archaic entrance, and a new temenos wall was built. An inscription records the dedication of a new altar by Hecatomnus (r.392–377 BCE) himself. Inscribed decrees in both Carian and Greek show that Idrieus and Ada (r.315–344 BCE) intervened in the governance of the sanctuary.

Sinuri remained an important religious centre after the Macedonian conquest of Asia Minor. In the 290s BCE, Sinuri was governed by the Macedonian dynast Pleistarchus as part of his territory in northern Caria alongside Heraclea at Latmus and Hyllarima. An inscribed decree of Pleistarchus' admits an outsider into the governing syngeneia of Pormounos. A break in the epigraphic record of Sinuri in the early 3rd century BCE suggests that the site was contested between Pleistarchus and Ptolemaic southern Caria in this time. Alongside Mylasa, it was most likely governed by Ptolemy II from the start of his reign in 282 BCE.

Sinrui lay on the frontier between the major poleis of Mylasa and Stratonicea from the time of the latter's foundation by the Seleucids in the 260s BCE. Like nearby Kasossos, it was absorbed into the growing polis of Mylasa in the Hellenistic period. Sinuri remained a prominent sanctuary but the governing synegeneia of Pormoonous became a constituent part of Mylasa. This process occurred by the time Olympichos, alternately a client of Seleucus II and Philip V, ruled Caria from Alinda in the late 3rd century BCE. Accordingly, the majority of inscriptions from Sinuri record their eponymous magistrate as being the stephanephoros of Mylasa. From the 1st century BCE, priests of Sinuri could belong to other Mylasan syngeneiai than that of Pormoonous. Priests served for life; while the priesthood may have been hereditary in earlier years, it could probably be bought and sold by the late 1st century BCE.

Caria was contested in the 3rd century between Antigonid, Seleucid, Ptolemaic, Rhodian and Pergamene interests. A fragmentary inscribed letter from Antiochus III to the community at Sinuri shows that his military campaign of 203 BCE reached Sinuri, although Sinuri received nominal independence from the conquering governor Zeuxis as part of Mylasa. Macedonian interests in Caria were ended with the Treaty of Apamea in 188 BCE, confirming Rhodian rule with Roman support. Mylasa recovered its free city status, with tax exemptions, under the Rhodians as previously under the Seleucids; this seemingly encouraged economic activity at the sacred lands of Sinuri.

Sinuri remained an important religious centre, still dependent on Mylasa, after being incorporated into Roman Asia. The epigraphic record at Sinuri stops abruptly in the second half of the 1st century BCE. The sanctuary may have been destroyed by Quintus Labienus when he sacked Mylasa in 40 BCE.