Year Structure Built, Pennsylvania Counties: 2000

	Total Housing Units	1999 to March 2000	1995 to 1998	1990 to 1994	1980 to 1989	1970 to 1979	1960 to 1969	1940 to 1959	1939 or Earlier
Pennsylvania	5,249,750	66,916	212,916	266,445	531,986	709,768	595,897	1,275,149	1,590,673

Adams	35,831	949	3,141	3,395	5,878	5,356	3,129	4,846	9,137
Allegheny	583,646	4,037	11,467	15,599	37,182	64,173	75,032	188,477	187,679
Armstrong	32,387	343	1,210	1,161	2,939	4,537	3,228	7,182	11,787
Beaver	77,765	627	2,262	2,956	4,868	10,376	9,104	25,440	22,132
Bedford	23,529	432	1,328	1,511	2,653	3,967	2,675	3,782	7,181

Berks	150,222	2,639	7,674	10,310	16,834	19,089	14,922	29,829	48,925
Blair	55,061	698	2,077	2,345	4,678	7,277	4,666	11,333	21,987
Bradford	28,664	434	1,419	1,763	3,458	5,010	2,461	3,190	10,929
Bucks	225,498	4,427	13,479	16,661	36,498	41,899	31,413	55,070	26,051
Butler	69,868	1,769	6,366	6,357	8,826	12,488	7,078	12,971	14,013

Cambria	65,796	416	1,460	2,042	4,477	8,607	5,115	17,874	25,805
Cameron	4,592	28	146	372	408	590	371	1,340	1,337
Carbon	30,492	237	1,048	2,099	5,694	3,624	1,898	3,726	12,166
Centre	53,161	953	3,819	4,283	8,213	10,408	7,518	8,719	9,248
Chester	163,773	4,617	13,250	13,899	31,267	28,716	20,979	24,250	26,795

Clarion	19,426	291	885	761	2,295	3,510	2,177	3,466	6,041
Clearfield	37,855	533	2,130	1,875	4,015	6,338	2,748	6,154	14,062
Clinton	18,166	242	827	1,057	1,531	3,394	2,117	3,482	5,516
Columbia	27,733	299	1,094	1,464	3,054	4,632	2,395	5,022	9,773
Crawford	42,416	582	2,095	1,988	3,883	7,616	4,482	8,289	13,481

Cumberland	86,951	1,626	5,455	7,221	13,261	14,665	11,665	16,570	16,488
Dauphin	111,133	1,611	5,331	6,501	12,702	18,379	13,607	28,444	24,558
Delaware	216,978	1,661	4,605	5,553	13,402	20,203	28,585	90,389	52,580
Elk	18,115	233	876	889	1,952	2,249	1,811	4,233	5,872
Erie	114,322	1,223	4,798	5,640	10,324	17,441	12,170	28,750	33,976

Fayette	66,490	848	2,668	2,886	5,920	8,986	5,393	15,131	24,658
Forest	8,701	15	439	277	867	757	1,478	3,050	1,818
Franklin	53,803	1,240	3,720	5,016	6,766	8,197	6,422	8,988	13,454
Fulton	6,790	110	348	494	940	1,529	740	943	1,686
Greene	16,678	245	643	858	1,810	2,775	1,207	3,262	5,878

Huntingdon	21,058	404	1,092	1,359	2,693	3,731	1,920	2,953	6,906
Indiana	37,250	503	1,710	2,171	4,756	7,198	3,873	6,247	10,792
Jefferson	22,104	207	877	782	2,091	3,742	2,027	4,168	8,210
Juniata	10,031	194	711	682	1,422	1,805	856	1,482	2,879
Lackawanna	95,362	628	2,563	3,573	7,437	10,819	8,431	15,820	46,091

Lancaster	179,990	3,338	10,993	15,592	28,523	27,147	18,828	29,672	45,897
Lawrence	39,635	421	1,565	1,300	2,524	4,787	3,567	11,614	13,857
Lebanon	49,320	848	2,275	3,092	5,636	7,463	4,670	10,125	15,211
Lehigh	128,910	2,038	5,329	6,072	15,057	19,368	15,922	28,548	36,576
Luzerne	144,686	1,197	3,679	5,905	10,186	20,946	12,067	27,269	63,437

Lycoming	52,464	510	2,087	2,950	4,676	7,646	5,161	10,532	18,902
McKean	21,644	211	744	752	1,485	2,276	1,892	5,001	9,283
Mercer	49,859	419	2,116	2,051	3,678	7,028	5,647	12,940	15,980
Mifflin	20,745	291	1,007	1,173	1,795	3,043	2,170	4,145	7,121
Monroe	67,581	2,017	5,698	8,919	19,599	12,438	5,774	5,994	7,142

Montgomery	297,434	5,075	15,422	18,148	35,774	42,310	43,091	77,513	60,101
Montour	7,627	136	355	618	1,147	1,313	611	1,019	2,428
Northampton	106,710	1,793	5,223	6,927	12,664	13,165	11,246	21,338	34,354
Northumberland	43,164	386	1,365	1,690	3,097	5,206	2,855	7,520	21,045
Perry	18,941	321	1,158	1,443	3,055	3,803	1,647	2,247	5,267

Philadelphia	661,958	1,833	5,420	6,576	21,965	45,940	81,148	222,871	276,205
Pike	34,681	656	2,943	5,025	9,618	7,341	3,454	2,997	2,647
Potter	12,159	210	789	719	1,661	1,575	1,216	1,883	4,106
Schuylkill	67,806	467	1,656	2,596	4,460	7,232	4,342	11,199	35,854
Snyder	14,890	170	744	913	2,272	2,659	1,585	2,100	4,447

Somerset	37,163	385	1,623	1,730	3,731	6,013	3,656	7,453	12,572
Sullivan	6,017	189	328	426	681	718	591	1,062	2,022
Susquehanna	21,829	398	1,170	1,783	3,479	3,416	1,796	2,236	7,551
Tioga	19,893	399	1,183	1,438	2,399	3,390	1,810	2,267	7,007
Union	14,684	146	869	1,212	2,068	2,687	1,505	1,964	4,233

Venango	26,904	205	898	815	2,429	4,098	2,588	5,375	10,496
Warren	23,058	309	741	989	2,162	3,379	2,573	4,596	8,309
Washington	87,267	1,243	3,452	4,073	7,254	11,922	9,702	21,514	28,107
Wayne	30,593	536	1,973	3,653	6,805	5,212	2,482	3,505	6,427
Westmoreland	161,058	1,901	5,933	7,313	14,304	25,115	22,073	41,769	42,650

Wyoming	12,713	260	779	944	1,719	2,631	1,127	1,384	3,869
York	156,720	3,307	10,386	13,808	21,089	24,418	15,408	30,625	37,679

U.S. Department of Commerce, Bureau of the Census, 2000 Census of Population and Housing
Prepared by the Pennsylvania State Data Center