Daniel Quare (1648 or 1649 – 21 March 1724) was an English clockmaker and instrument maker who invented a repeating watch movement in 1680 and a portable barometer in 1695.

One of the early members of the Friends' (Quakers') meeting at Devonshire House, Bishopsgate, he married there, on 18 April 1676, Mary, daughter of Jeremiah Stevens, maltster, of High Wycombe, Buckinghamshire.

A little later he settled in Lombard Street, whence he migrated in 1685 to the King's Arms in Exchange Alley, long a favourite home for watchmakers.

On 4 June 1686 Quare, with about fifty other Friends, was summoned to appear before the commissioners appointed by James II to sit at Clifford's Inn to hear their grievances.

The pendulum was a novelty; so were the spiral spring and anchor escapement invented by Robert Hooke, and the fusee chain.

To Quare belongs the honour of inventing repeating watches, and it is also claimed for him that he adapted the concentric minute hand.

If he was actually the inventor of the latter, he must have constructed it early in his career, for two concentric hands are shown in a diagram in Christiaan Huygens's Horologium Oscillatorium (1673).

The clock still stands in its original place, by the side of the king's bed, in Hampton Court Palace, and shows sundial time, latitude and longitude, and the course of the sun.

On 2 August 1695, in the face of some opposition from the Clockmakers' Company, a patent was granted to Quare for a portable barometer.

The Daily Post of Thursday, 26 March, reported: "Last week dy'd Mr. Daniel Quare, watchmaker in Exchange Alley, who was famous both here and at foreign courts for the great improvements he made in that art, and we hear he is succeeded in his shop and trade by his partner, Mr. Horseman", i.e. Stephen Horseman, apprenticed to Quare in 1702, and admitted to the Clockmakers' Company in 1709.

The widow lived with her son, Jeremiah, until her death on 4 November 1728 (aged 77) in the parish of St Dionis Backchurch, Lime Street.