Police say the 27 and 42 year old men were injured outside the Rosslea Hotel in Rhu last night.
Their injuries are not thought to be life-threatening, but anyone who saw what happened is being urged to come forward.
Police in Argyll and West Dunbartonshire are appealing for information following a disturbance outside a hotel in Rhu.
The incident happened around 10pm on Saturday, 23 October, outside the Rosslea Hotel, and two men had to be taken to hospitals by the ambulance service.
A 27-year-old man had been seriously assaulted and was taken to the Queen Elizabeth University Hospital. A 42-year-old man had been assaulted and was taken to the Royal Alexandria Hospital. Their injuries are not believed to be life threatening at this time.
Detective Inspector Fiona Macarthur, of Dumbarton CID, said: "We know the hotel area would have been relatively busy at the time and the consequences of this incident could have been far worse.
"We're appealing to people who witnessed the incident or has any relevant information to contact us."
You can contact Police Scotland on 101 quoting incident number 4135 of 23 October. Alternatively, contact Crimestoppers anonymously on 0800 555 111.
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