The 10 least-generous counties with 10,000 or more tax returns in the country, with region and percentage of disposable income given to charity:

Rockingham, N.H. 3.7

Tolland, Conn. 3.9

Hillsborough, N.H. 4.0

Middlesex, Conn. 4.2

Bristol, Mass. 4.4

Essex, Mass. 4.4

Worcester, Mass. 4.4

Hampshire, Mass. 4.5

Hunterdon, N.J. 4.5

Lackawanna, Pa. 4.6