- Saavedra 103
- Sabo 285
- Sadler 604
- Saenz 318
- Sage 273
- Sager 334
- Salas 434
- Salazar 1238
- Salcedo 102
- Salcido 73
- Saldana 198
- Saldivar 80
- Saleh 67
- Salerno 312
- Salgado 183
- Salinas 639
- Salisbury 344
- Salmon 368
- Salter 334
- Sammons 245
- Sample 252
- Samples 187
- Sampson 997
- Sams 362
- Samson 217
- Samuels 466
- Samuelson 233
- Sanabria 36
- Sanborn 281
- Sanchez 4364
- Sandberg 250
- Sander 253
- Sanders 5123
- Sanderson 714
- Sandlin 182
- Sandoval 1010
- Sands 551
- Sanford 1073
- Santamaria 74
- Santana 332
- Santiago 832
- Santillan 50
- Santoro 292
- Santos 1409
- Sapp 538
- Sargent 788
- Sarmiento 70
- Satterfield 345
- Sauceda 47
- Saucedo 144
- Sauer 551
- Saunders 1995
- Savage 1400
- Sawyer 1449
- Saxton 173
- Saylor 429
- Sayre 198
- Scales 252
- Scanlon 406
- Scarborough 318
- Scarbrough 194
- Schaefer 1460
- Schaeffer 550
- Schafer 892
- Schaffer 692
- Schell 430
- Scherer 485
- Schiller 308
- Schilling 536
- Schindler 325
- Schmid 435
- Schmidt 4359
- Schmitt 1336
- Schmitz 917
- Schneider 3381
- Schofield 329
- Scholl 298
- Schott 362
- Schrader 542
- Schramm 232
- Schreiber 572
- Schreiner 257
- Schroeder 2426
- Schubert 404
- Schuler 496
- Schulte 655
- Schultz 3187
- Schulz 868
- Schulze 285
- Schumacher 920
- Schuster 657
- Schwab 592
- Schwartz 3017
- Schwarz 596
- Schweitzer 329
- Scoggins 199
- Scott 8352
- Scroggins 167
- Scruggs 348
- Scully 294
- Seal 242
- Seals 276
- Seaman 442
- Searcy 236
- Sears 893
- Seaton 212
- Seay 344
- See 169
- Seeley 290
- Segal 234
- Segovia 80
- Segura 199
- Seibert 342
- Seidel 294
- Seifert 336
- Seitz 429
- Selby 305
- Self 609
- Sell 385
- Sellers 1193
- Sells 164
- Sepulveda 145
- Serna 143
- Serrano 495
- Settle 166
- Severson 352
- Seward 264
- Sewell 584
- Sexton 1288
- Seymour 708
- Shackelford 230
- Shafer 805
- Shaffer 1912
- Shah 1450
- Shanahan 269
- Shank 429
- Shanks 286
- Shapiro 1105
- Sharkey 253
- Sharma 236
- Sharp 2137
- Sharpe 883
- Shaver 529
- Shaw 4124
- Shay 262
- Shea 1174
- Shearer 581
- Sheehan 907
- Sheets 660
- Sheffield 496
- Sheldon 578
- Shell 323
- Shelton 2514
- Shen 95
- Shepard 1034
- Shepherd 1599
- Sheppard 949
- Sheridan 740
- Sherman 2218
- Sherrill 353
- Sherrod 132
- Sherwood 648
- Shi 25
- Shields 1452
- Shin 274
- Shinn 199
- Shipley 593
- Shipman 358
- Shipp 255
- Shockley 293
- Shoemaker 1026
- Shook 466
- Shore 329
- Short 1645
- Shorter 106
- Showalter 272
- Shuler 264
- Shull 288
- Shultz 505
- Shumaker 243
- Shuman 219
- Shumate 240
- Sibley 221
- Sides 204
- Siegel 901
- Sierra 211
- Sifuentes 47
- Sigler 204
- Sikes 225
- Siler 183
- Silva 1992
- Silver 770
- Silverman 630
- Simmons 4809
- Simms 567
- Simon 2243
- Simons 726
- Simonson 267
- Simpkins 248
- Simpson 4079
- Sims 2825
- Sinclair 708
- Singer 966
- Singh 826
- Singletary 253
- Singleton 1289
- Sisk 323
- Sisson 277
- Sizemore 467
- Skaggs 467
- Skelton 385
- Skidmore 312
- Skinner 1578
- Skipper 248
- Slack 370
- Slade 301
- Slagle 247
- Slater 999
- Slattery 294
- Slaughter 672
- Sledge 127
- Sloan 1332
- Slocum 241
- Slone 223
- Small 1397
- Smalley 313
- Smalls 123
- Smallwood 397
- Smart 669
- Smiley 474
- Smith 26753
- Smoot 189
- Smyth 279
- Snead 229
- Sneed 437
- Snell 580
- Snider 974
- Snipes 145
- Snodgrass 380
- Snow 1379
- Snowden 242
- Snyder 4462
- Soares 220
- Solano 121
- Solis 555
- Solomon 1268
- Solorio 42
- Solorzano 68
- Somers 329
- Sommer 374
- Sommers 333
- Song 242
- Sorensen 847
- Sorenson 486
- Soria 67
- Soriano 132
- Sorrell 145
- Sosa 262
- Sotelo 89
- Soto 979
- Sousa 356
- South 237
- Southard 221
- Southerland 158
- Southern 138
- Souza 477
- Sowell 201
- Sowers 279
- Spain 263
- Spalding 260
- Spangler 596
- Spann 219
- Sparks 1752
- Sparrow 158
- Spaulding 518
- Spear 357
- Spearman 124
- Spears 1025
- Speer 340
- Spence 1005
- Spencer 3493
- Spicer 500
- Spivey 519
- Sprague 663
- Spring 215
- Springer 979
- Sprouse 185
- Spruill 138
- Spurlock 218
- Squires 384
- Stack 388
- Stafford 1391
- Staggs 215
- Stahl 806
- Staley 494
- Stallings 460
- Stallworth 103
- Stamper 298
- Stanfield 256
- Stanford 567
- Stanley 2562
- Stanton 1110
- Staples 403
- Stapleton 504
- Stark 1314
- Starkey 407
- Starks 297
- Starling 205
- Starnes 368
- Starr 884
- Staton 309
- Stauffer 542
- Stclair 301
- Stearns 434
- Steed 182
- Steele 2450
- Steen 326
- Steffen 417
- Stein 1687
- Steinberg 503
- Steiner 885
- Stephens 3838
- Stephenson 1483
- Stepp 225
- Sterling 610
- Stern 1081
- Stevens 4431
- Stevenson 1905
- Steward 468
- Stewart 7117
- Stiles 697
- Still 303
- Stine 343
- Stinnett 170
- Stinson 734
- Stjohn 338
- Stock 432
- Stockton 297
- Stoddard 387
- Stokes 1579
- Stoll 384
- Stone 4280
- Stoner 528
- Storey 384
- Storm 266
- Story 562
- Stout 1304
- Stovall 357
- Stover 708
- Stowe 285
- Strain 247
- Strand 310
- Strange 338
- Stratton 693
- Straub 334
- Strauss 573
- Street 529
- Streeter 241
- Strickland 2059
- Stringer 429
- Strom 297
- Strong 1216
- Stroud 667
- Stuart 1040
- Stubblefield 208
- Stubbs 460
- Stuckey 262
- Stull 248
- Stump 409
- Sturgeon 200
- Sturm 284
- Suarez 604
- Suggs 290
- Sullivan 5211
- Summers 1618
- Sumner 596
- Sumpter 112
- Sun 151
- Sutherland 917
- Sutter 283
- Sutton 2508
- Swafford 211
- Swain 697
- Swan 640
- Swann 307
- Swanson 2524
- Swartz 927
- Swearingen 187
- Sweat 168
- Sweeney 1614
- Sweet 871
- Swenson 876
- Swift 687
- Swisher 257
- Switzer 322
- Swope 233
- Sykes 674
- Sylvester 486
- Szymanski 293
Lasnames By S